Question

why is photosynthesis considered as endothermic reaction ?

Answer 1

endothermic reaction means the reaction in which absorption of heat or energy takes place.
in photosynthesis process, absorption of solar energy takes place. so it is considered as endothermic reaction.

I hope it will help you

Answer 2

in the process of photosynthesis the heat is exposed I mean the heat in released so it is referred as the endothermic reaction