The correct answer is C. Photosynthesis.
Explanation
Endothermic reactions are a chemical and physical term used to refer to the process of transformation of two or more substances into different ones, and that particularly consume energy, that is, that the resulting elements have higher energy levels than the initial elements, due to that have taken part of the heat of the environment. According to the above, photosynthesis is an endothermic reaction since plants absorb solar energy, to perform various processes that allow them to make their food, grow and generally live. So, the correct answer is C. Photosynthesis.
