Answer:
Animals play a key role in the nitrogen cycle. Animals are consumers of nitrogen or nitrogenous products. They obtain the required nitrogen from plants or other animals, which they eat. Animals store nitrogen in their body in the form of proteins and nucleic acids (such as DNA). When animals die, their bodies act as sources of nitrogenous products. Decomposers (such as soil microbes), break down the nitrogen in animals' bodies and release it to be used by other consumers.
