What is photosynthesis​

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.

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the process to make food for plants

Explanation:

the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.

it's c. (to reduce the greenhouse effect/carbon gasses)

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.