What is an exothermic chemical reaction?

AIt is a reaction that converts matter to heat.
BIt is a reaction that requires heat to proceed.
CIt is a reaction that draws heat from its surroundings.
DIt is a reaction that releases heat to its surroundings.

Verified Answer :

Exo, meaning "out-", thermic meaning heat or temperature
Outgoing heat or a release of energy in the form of heat or light
Reactant -> Product + Energy

Therefore, the answer is D, it is a reaction that releases heat to its surroundings