A.I. Explanation:

Correct answer: associated

Explanation: The word 'associated' fits grammatically as it describes the relationship between the genes and the ability to adhere to a vegetarian lifestyle. It is in the correct tense and form to match the context of the sentence, indicating a connection or correlation.

Meaning: 'Associated' means to be connected or related to something.

Wrong options:

• trigger: The word 'trigger' implies causing something to happen, which does not fit the context of describing a relationship between genes and lifestyle adherence.
• determined: The word 'determined' suggests a conclusion or decision, which does not appropriately describe the relationship intended in this context.
• doubled: The word 'doubled' refers to an increase in quantity, which does not relate to the context of genetic association.

Correct answer: predisposed

Explanation: The term 'predisposed' is used to indicate a genetic inclination or tendency towards vegetarianism. It fits grammatically and contextually as it describes the potential genetic influence on someone's dietary choices.

Meaning: 'Predisposed' means having a tendency or inclination towards something, often due to genetic factors.

Wrong options:

• associated: The word 'associated' is already used in the first blank and does not fit here as it does not describe a genetic tendency.
• trigger: The word 'trigger' implies causing an action, which does not fit the context of genetic inclination.
• determined: The word 'determined' suggests a definitive conclusion, which does not align with the idea of genetic predisposition.
• doubled: The word 'doubled' refers to an increase in quantity and does not relate to genetic tendencies.

Correct answer: tackle

Explanation: The word 'tackle' is appropriate as it indicates the intention to address or confront the question of genetic predisposition to vegetarianism. It fits grammatically and contextually as it suggests an action researchers hope to undertake in future studies.

Meaning: 'Tackle' means to confront or deal with a problem or question.

Wrong options:

• associated: The word 'associated' does not fit here as it does not imply action or addressing a question.
• trigger: The word 'trigger' suggests causing something to happen, which does not align with the intention of addressing a question.
• determined: The word 'determined' implies a conclusion rather than an action to be taken, which does not fit the context of future research efforts.
• doubled: The word 'doubled' refers to an increase in quantity and does not relate to the action of addressing a question.