which one of these reactions is energy released? A all reactions B no reactions C endothermic reactions D exothermic reactions

The reaction that is energy released is exothermic reactions (answer D)

Explanation

Exothermic reaction is a chemical reaction that releases energy through heat or light.

Example of exothermic reaction is combustion reaction such as lighting a candle which produces carbon dioxide, water and heat.

Endothermic reaction in other hand it is a chemical reaction that absorb energy from the surrounding.