Answer the following question given this paragraph: 

For an endothermic chemical reaction, energy is absorbed as reactants are converted to products. Exothermic and endothermic reactions can be thought of as having energy as either a product of the reaction or a reactant. Exothermic reactions give off energy, so energy is a product. Endothermic reactions require energy, so energy is a reactant.


Q: Energy is absorbed as reactants are converted to products in what kind of chemical reaction?


A:
endothermic