Answer: Option A) exothermic
A reaction that releases heat is exothermic
Step-by-step explanation:
An exothermic reaction is a chemical reaction that occurs spontaneously and brings about the release of energy as reactants particles mix to form products.
An example of a reaction that releases heat is cellular respiration where 1 mole of glucose is oxidized to produce energy. Thus, cellular respiration is an exothermic reaction.