Meaning: To 'convert' means to change something into a different form or use, in this case, sunlight into energy.

Wrong options:

• withdraw: Withdraw means to take back or remove, which does not relate to the process of utilizing sunlight.
• involve: Involve means to include or engage, which does not accurately describe the action of changing sunlight into energy.
• thrive: Thrive means to grow or develop well, which is not the action being described in this context.
• provide: Provide means to supply or make available, which does not fit the action of transforming sunlight.

Correct answer: breathe

Explanation: The verb 'breathe' is appropriate here as it describes the action of taking in oxygen, which is a direct result of the photosynthesis process. It is in the present tense, aligning with the subject 'we' and the context of discussing oxygen's role in life.

Meaning: To 'breathe' means to take air into the lungs and expel it, specifically referring to the intake of oxygen.

Wrong options:

• withdraw: Withdraw does not relate to the act of taking in oxygen and is not a verb that fits this context.
• involve: Involve does not describe the action of taking in oxygen and is unrelated to the process of respiration.
• thrive: Thrive refers to flourishing or prospering, which does not fit the action of inhaling oxygen.
• provide: Provide means to supply, which does not accurately describe the action of breathing.

Correct answer: thrive

Explanation: The verb 'thrive' is suitable here as it indicates the ability of life forms to grow and flourish, which is a direct consequence of the energy provided by plants through photosynthesis. It fits grammatically in the present tense and aligns with the context of discussing life on Earth.

Meaning: To 'thrive' means to grow or develop successfully, particularly in a healthy or vigorous way.

Wrong options:

• withdraw: Withdraw means to take back or remove, which does not relate to the growth or development of life forms.
• involve: Involve means to include or engage, which does not accurately describe the flourishing of life forms.
• provide: Provide means to supply or make available, which does not fit the context of life forms growing or developing.