Question

photosynthesis is an example of an exothermic reaction. an endothermic reaction. a reaction that gives off heat. a reaction that emits energy.

Explanation:

Photosynthesis is a process where plants use light - energy to convert carbon dioxide and water into glucose and oxygen. It requires an input of energy (light), so it is an endothermic reaction. Exothermic reactions give off heat or energy.

Answer:

an endothermic reaction.