Exothermic reactions release heat when the reactants produce products. The process of respiration is an exothermic reaction as it releases heat. Thus, option D is correct.
An exothermic is a type of reaction that involves the release of heat during the reaction through product formation. The respiration reaction is exothermic as it involves the breakdown of oxygen and glucose into energy.
Thermal decomposition is an endothermic reaction as it requires energy for completion. Similarly, photosynthesis and reaction between ammonium nitrate and water are endothermic reactions as they also require energy from the external source.
Therefore, respiration is an exothermic reaction.
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