Meaning: 'Basil' is a culinary herb often used in cooking, particularly in Italian cuisine, and is known for its aromatic leaves.

Wrong options:

• strawberries: 'Strawberries' is a noun referring to a type of fruit, which does not fit the context of pairing with tomatoes for growth enhancement.
• sustainable: 'Sustainable' is an adjective that describes practices that do not deplete resources, but it does not refer to a specific plant and is irrelevant in this context.
• repel: 'Repel' is a verb that means to drive away, which does not fit as it does not name a plant and is not grammatically correct here.
• deter: 'Deter' is a verb that means to discourage or prevent, which does not fit as it does not name a plant and is not appropriate in this context.
• vibrant: 'Vibrant' is an adjective that describes something full of energy and life, but it does not refer to a plant and is not suitable here.
• discourage: 'Discourage' is a verb that means to dissuade or prevent, which does not fit as it does not name a plant and is not relevant in this context.

Correct answer: discourage

Explanation: The word 'discourage' is a verb that fits grammatically as it describes the action that basil performs regarding harmful insects. The context indicates that basil has a protective role in the garden, making this choice logical and coherent with the overall message about companion planting.

Meaning: 'Discourage' means to dissuade or prevent someone or something from doing something, in this case, harmful insects from infesting plants.

Wrong options:

• deter: 'Deter' is a verb that means to prevent or discourage, but it does not fit the grammatical structure here as it does not align with the subject 'basil' in this context.
• repel: 'Repel' is a verb that means to drive away, which could fit contextually but does not match the grammatical structure required after 'basil.'
• sustainable: 'Sustainable' is an adjective that does not fit grammatically as it cannot describe an action performed by basil.
• vibrant: 'Vibrant' is an adjective that describes a quality and does not fit as a verb in this context.
• strawberries: 'Strawberries' is a noun that does not fit the grammatical structure as it cannot describe an action.
• discourage: 'Discourage' is a verb that fits contextually but is not the correct form needed here.

Correct answer: deter

Explanation: The word 'deter' is a verb that fits grammatically as it describes the action of preventing carrot fly larvae. The context of the sentence indicates that onions help to keep pests away, making this choice logical and coherent with the overall message about companion planting.

Meaning: 'Deter' means to prevent or discourage someone or something from taking action, in this case, preventing carrot fly larvae from infesting carrots.

Wrong options:

• sustainable: 'Sustainable' is an adjective that does not fit grammatically as it cannot describe an action in this context.
• vibrant: 'Vibrant' is an adjective that describes a quality and does not fit as a verb in this context.
• repel: 'Repel' is a verb that means to drive away, which could fit contextually but does not match the grammatical structure required here.
• discourage: 'Discourage' is a verb that means to dissuade or prevent, but it does not fit the grammatical structure needed after 'help to.'
• basil: 'Basil' is a noun that does not fit as it cannot describe an action in this context.
• strawberries: 'Strawberries' is a noun that does not fit the grammatical structure as it cannot describe an action.

Correct answer: vibrant

Explanation: The word 'vibrant' is an adjective that fits grammatically as it describes the type of ecosystem being promoted. The context indicates a positive and lively environment, making this choice logical and coherent with the overall message about companion planting.

Meaning: 'Vibrant' means full of energy and life, indicating a healthy and thriving ecosystem.

Wrong options:

• sustainable: 'Sustainable' is an adjective that describes practices that do not deplete resources, but it does not fit the context of describing an ecosystem in this way.
• basil: 'Basil' is a noun that does not fit as it cannot describe the quality of an ecosystem.
• deter: 'Deter' is a verb that means to prevent or discourage, which does not fit as it cannot describe an ecosystem.
• discourage: 'Discourage' is a verb that means to dissuade or prevent, which does not fit as it cannot describe an ecosystem.
• repel: 'Repel' is a verb that means to drive away, which does not fit as it cannot describe the quality of an ecosystem.
• strawberries: 'Strawberries' is a noun that does not fit the grammatical structure as it cannot describe an ecosystem.