A.I. Explanation:

Correct answer: poisonous

Explanation: The word 'poisonous' is an adjective that describes the box jellyfish as being harmful or lethal due to its venom. This fits grammatically as it describes the noun 'animal' and aligns with the context of discussing the jellyfish's dangerous reputation.

Meaning: 'Poisonous' refers to something that can cause harm or death through toxins.

Wrong options:

• fighting: 'Fighting' is a gerund that implies a struggle or conflict, which does not describe the nature of the jellyfish.
• considerable: 'Considerable' is an adjective that means large in amount or extent, but it does not convey the lethal quality of the jellyfish.
• attacking: 'Attacking' is a gerund that describes an action rather than a characteristic of the jellyfish.
• scarring: 'Scarring' is a noun that refers to marks left on the skin, which does not fit the description of the jellyfish's nature.
• fatal: 'Fatal' is an adjective that means causing death, but it does not fit grammatically as it does not directly modify 'animal' in the same way as 'poisonous.'
• ferocious: 'Ferocious' is an adjective that describes something as savagely fierce, which does not specifically relate to the jellyfish's venomous nature.

Correct answer: attacking

Explanation: The word 'attacking' is a gerund that describes the action performed by the venom in the jellyfish's tentacles. It fits grammatically as it serves as the subject of the clause and aligns with the context of how the venom affects its prey.

Meaning: 'Attacking' refers to the act of causing harm or injury to something.

Wrong options:

• fighting: 'Fighting' implies a struggle or conflict, which does not accurately describe the action of the venom.
• considerable: 'Considerable' is an adjective that does not fit as it does not describe an action.
• scarring: 'Scarring' is a noun that refers to the result of injury, which does not fit the context of the venom's action.
• poisonous: 'Poisonous' is an adjective that describes a quality rather than an action, making it unsuitable here.
• fatal: 'Fatal' is an adjective that describes something that causes death, but it does not convey the action of the venom.
• painful: 'Painful' is an adjective that describes a sensation rather than an action, which does not fit the context.

Correct answer: painful

Explanation: The word 'painful' is an adjective that describes the intense discomfort caused by the jellyfish's sting. It fits grammatically as it modifies the noun 'sting' and aligns with the context of the severe effects on human victims.

Meaning: 'Painful' refers to something that causes physical discomfort or suffering.

Wrong options:

• fighting: 'Fighting' is a gerund that does not relate to the sensation caused by the sting.
• considerable: 'Considerable' is an adjective that means large in amount, but it does not describe the nature of the sting's sensation.
• attacking: 'Attacking' is a gerund that describes an action rather than the sensation of the sting.
• scarring: 'Scarring' is a noun that refers to marks left on the skin, which does not describe the immediate sensation of the sting.
• poisonous: 'Poisonous' describes a quality of the jellyfish but does not specifically relate to the sensation of the sting.
• fatal: 'Fatal' describes something that causes death, which does not accurately describe the immediate experience of pain.

Correct answer: considerable

Explanation: The word 'considerable' is an adjective that describes the significant amount of discomfort experienced by survivors. It fits grammatically as it modifies the noun 'discomfort' and aligns with the context of the lasting effects of the jellyfish sting.

Meaning: 'Considerable' means large in amount or degree, indicating that the discomfort is significant.

Wrong options:

• fighting: 'Fighting' is a gerund that does not relate to the amount of discomfort experienced.
• attacking: 'Attacking' is a gerund that describes an action rather than the extent of discomfort.
• scarring: 'Scarring' is a noun that refers to marks left on the skin, which does not describe the amount of discomfort.
• poisonous: 'Poisonous' describes a quality of the jellyfish but does not relate to the discomfort experienced by survivors.
• painful: 'Painful' describes the nature of the discomfort but does not convey the extent of it, making it less suitable here.
• fatal: 'Fatal' describes something that causes death, which does not fit the context of discomfort.

Correct answer: scarring

Explanation: The word 'scarring' is a noun that refers to the marks left on the skin after the jellyfish's tentacles make contact. It fits grammatically as it serves as the object of the preposition 'of' and aligns with the context of the physical effects of the sting.

Meaning: 'Scarring' refers to the marks or blemishes left on the skin after an injury.

Wrong options:

• fighting: 'Fighting' is a gerund that does not relate to the physical effects of the sting.
• considerable: 'Considerable' is an adjective that describes an amount but does not fit as a noun in this context.
• attacking: 'Attacking' is a gerund that describes an action rather than a physical result of the sting.
• poisonous: 'Poisonous' describes a quality of the jellyfish but does not relate to the physical marks left on the skin.
• painful: 'Painful' is an adjective that describes a sensation rather than a physical result, making it unsuitable here.
• fatal: 'Fatal' describes something that causes death, which does not fit the context of physical marks.