Final answer:
Photosynthesis is an endothermic reaction that absorbs light energy to produce glucose from carbon dioxide and water, while releasing oxygen.
Step-by-step explanation:
Photosynthesis is a process that involves multiple chemical reactions in which light energy is converted into chemical energy stored in glucose, and oxygen is released as a byproduct. This process is considered an endothermic reaction because it absorbs energy from the environment, specifically light energy from the sun, to drive the synthesis of glucose from carbon dioxide and water. The general equation for photosynthesis is 6CO2 + 6H2O + Light Energy → C6H12O6 + 6O2, indicating the requirement of energy to produce glucose.