A.I. Explanation:

Correct answer: fills

Explanation: The verb 'fills' is in the present tense and correctly describes the action of love entering a mother's heart. It fits grammatically as it agrees with the singular subject 'love' and maintains the context of emotional expression.

Meaning: 'Fills' means to make something full, in this case, the love that a mother feels.

Wrong options:

• dwelling: Dwelling is a noun that refers to a place of residence, which does not fit the context of an emotional state.
• bear: Bear is a noun referring to the animal, which does not grammatically fit as a verb in this sentence.
• shot: Shot is the past tense of shoot, which does not fit as it does not describe an action related to love.
• dead: Dead is an adjective that describes a state of being, which does not fit as it does not convey an action.
• troubled: Troubled is an adjective that describes a state of distress, which does not fit as it does not convey an action.
• cubs: Cubs is a noun referring to young bears, which does not fit as it does not convey an action.

Correct answer: bear

Explanation: The word 'bear' serves as a noun that refers to the animal, fitting grammatically as it aligns with the context of the mother bear observing her young. It maintains the sentence's focus on maternal instincts in animals.

Meaning: 'Bear' refers to the animal itself, in this case, the mother bear.

Wrong options:

• dwelling: Dwelling is a noun that refers to a place of residence, which does not fit as it does not relate to the context of the sentence.
• shot: Shot is the past tense of shoot, which does not fit as it does not refer to the animal in this context.
• dead: Dead is an adjective that describes a state of being, which does not fit as it does not refer to the animal.
• cubs: Cubs is a noun referring to young bears, which does not fit as it does not refer to the mother bear herself.
• troubled: Troubled is an adjective that describes a state of distress, which does not fit as it does not refer to the animal.

Correct answer: cubs

Explanation: The word 'cubs' is a plural noun that refers to the young of the bear, fitting grammatically as it aligns with the context of the mother bear watching her offspring. It maintains the focus on maternal instincts and the familial bond.

Meaning: 'Cubs' refers to the young bears, specifically the offspring of the mother bear.

Wrong options:

• dwelling: Dwelling is a noun that refers to a place of residence, which does not fit as it does not relate to the context of the sentence.
• bear: Bear is a noun referring to the adult animal, which does not fit as it does not refer to the young.
• shot: Shot is the past tense of shoot, which does not fit as it does not refer to the young bears.
• dead: Dead is an adjective that describes a state of being, which does not fit as it does not refer to the young bears.
• troubled: Troubled is an adjective that describes a state of distress, which does not fit as it does not refer to the young bears.

Correct answer: shot

Explanation: The word 'shot' is the past participle of the verb 'shoot,' fitting grammatically as it describes the action that has happened to the ape's mate. It aligns with the context of loss and sorrow experienced by the ape.

Meaning: 'Shot' refers to the act of shooting, indicating that the ape's mate has been killed.

Wrong options:

• dwelling: Dwelling is a noun that refers to a place of residence, which does not fit as it does not relate to the action of loss.
• bear: Bear is a noun referring to the animal, which does not fit as it does not describe an action related to the mate's fate.
• dead: Dead is an adjective that describes a state of being, which does not fit as it does not convey an action.
• cubs: Cubs is a noun referring to young bears, which does not fit as it does not relate to the action of loss.
• troubled: Troubled is an adjective that describes a state of distress, which does not fit as it does not convey an action.