What is responsible for oxygen production in the cell

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

What is the ecological role of food chains and food webs

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes