What do arrows in a food chain and food web represent?

Found evidence that the continents were joined together at one time.

The location of the stomach is the diaprham

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.