A.I. Explanation:

Correct answer: recalling

Explanation: The word 'recalling' is a gerund that functions as the subject of the sentence, indicating the action of bringing a memory back to mind. It fits grammatically as it aligns with the verb 'changes' and maintains the context of discussing memory retrieval.

Meaning: 'Recalling' means to bring a memory back into one's mind or to remember something.

Wrong options:

• launching: 'Launching' is a gerund that refers to starting or initiating something, which does not fit the context of memory retrieval.
• submits: 'Submits' is a verb that means to present or hand over, which does not relate to the act of remembering.
• refers: 'Refers' is a verb that indicates pointing to or mentioning something, but it does not fit as a subject in this context.
• pattern: 'Pattern' is a noun that describes a repeated design or sequence, which does not fit as the subject of the sentence.
• differs: 'Differs' is a verb that means to be unlike or distinct, which does not serve as a subject in this context.

Correct answer: refers

Explanation: The word 'refers' is a verb that indicates the action of defining or describing something. It fits grammatically as it follows the subject 'a false memory' and maintains the context of explaining what a false memory is.

Meaning: 'Refers' means to mention or describe something in a particular way.

Wrong options:

• launching: 'Launching' does not fit as it implies starting something, which is not relevant to defining a memory.
• recollects: 'Recollects' is a verb that means to remember something, but it does not fit the structure of the sentence as it requires a definition.
• pattern: 'Pattern' is a noun that does not fit grammatically as it cannot serve as a verb in this context.
• differs: 'Differs' is a verb that indicates a distinction, which does not fit the context of defining a memory.
• submits: 'Submits' is a verb that means to present or yield, which does not relate to the definition of a memory.

Correct answer: pattern

Explanation: The word 'pattern' is a noun that refers to a specific arrangement or sequence of events. It fits grammatically as the subject of the clause and is contextually appropriate as it describes the type of electrical activity being discussed.

Meaning: 'Pattern' refers to a repeated or regular arrangement of elements.

Wrong options:

• launching: 'Launching' is a gerund that means to start something, which does not fit the context of describing electrical activity.
• recalling: 'Recalling' is a gerund that refers to the act of remembering, which does not fit as a noun in this context.
• refers: 'Refers' is a verb that cannot serve as a noun, making it grammatically incorrect here.
• differs: 'Differs' is a verb that indicates a distinction, which does not fit as a noun in this context.
• submits: 'Submits' is a verb that means to present or yield, which does not relate to the context of describing a pattern.

Correct answer: differs

Explanation: The word 'differs' is a verb that indicates a distinction or variation. It fits grammatically as it follows the subject 'it' and maintains the context of contrasting electrical activities associated with different types of memory.

Meaning: 'Differs' means to be unlike or to vary from something else.

Wrong options:

• launching: 'Launching' does not fit as it implies starting something, which is not relevant to the context of memory.
• refers: 'Refers' is a verb that indicates mentioning or describing, which does not fit the context of contrasting activities.
• pattern: 'Pattern' is a noun that cannot serve as a verb in this context, making it grammatically incorrect.
• submits: 'Submits' is a verb that means to present or yield, which does not relate to the context of contrasting activities.
• recalling: 'Recalling' is a gerund that refers to the act of remembering, which does not fit as a verb in this context.