Answer:
1. Catabolic reactions
Step-by-step explanation:
Metabolism refers to the chemical reaction taking place in a system which could either form the large molecules from the small molecules or the form small molecules from the large molecules.
The process which involves the formation of large molecules is called the catabolic reactions whereas the reactions which form the small molecules are known as the anabolic reactions.
In the given question, since the smaller molecules are formed by degradation of large molecules, therefore, are considered the catabolic pathways like the dissociation of ATP to ADP and Pi. The catabolic reaction is exothermic and releases energy.
Thus, Catabolic reaction is correct.