Question

Produce oxygen that we need to live.
b. break down garbage and dead organisms.
c. change the genetic composition of plants and animals.
d. all the above

Answer 1

Photosynthesis is a complex process that takes place in cells of green plants. Such as tree's. Radiant energy from the sun is used to combine carbon dioxide and water to produce oxygen, carbohydrates (such as glucose), and other nutrient molecules. I believe this answers your question. Sorry if it doesn't.