Worth 47 !

why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?

Photosynthesis requires energy, making it an endothermic reaction. Light, generally sunlight, is the source of this energy. The process converts the sun’s electromagnetic energy into chemical energy, which is then stored in chemical bonds in the plant. Sunlight is the primary source of energy on the surface of Earth.

c) should be the answer.