What process involves converting energy released from decaying atoms into usable forms?

The process that involves converting energy released from decaying atoms into usable forms is radioactive decay. During radioactive decay, unstable atomic nuclei release energy in the form of radiation as they transform into more stable forms. This energy can potentially be harnessed for practical applications, depending on the type of decay and the materials involved. For example, the heat generated from the decay of certain isotopes can be used to produce steam for electricity generation.

The other choices describe different nuclear processes but do not specifically focus on the conversion of energy from decaying atoms. Fission refers to the splitting of heavy atomic nuclei into lighter ones, releasing energy, while fusion involves combining light nuclei to form heavier ones, also releasing energy. Decay management implies a strategy for handling decay products or decay waste, rather than the process of energy conversion itself.