photosynthesis, however, doesn´t occur in the winter or at night. thats why plants have cellular respiration.
water, light energy, and carbon dioxide are needed to create photosynthesis. these are called reactants.
photosynthesis makes glucose and oxygen. these are products.
animals exhale carbon dioxide, and plants need carbon dioxide to go through photosynthesis. animals need food and oxygen from plants. photosynthesis makes the world spin, my friends, and that is where i leave you today.