occurs without an overall input of energy.Group of answer choicesspontaneous processendergonic reactionenergy couplingmetabolismNext

The correct answer to the question regarding a process that occurs without an overall input of energy is spontaneous process.

Explanation:

A spontaneous process is one that occurs naturally under certain conditions, without the need for additional energy input. Such processes often lead to an increase in entropy, which is a measure of disorder or randomness in a system. Examples include the melting of ice at room temperature or the rusting of iron.

In contrast, "energetic reactions" (or endergonic reactions) require energy input to proceed, and energy coupling refers to the use of energy released from one process to drive another. Metabolism encompasses all biochemical reactions in an organism, including those that are spontaneous.

Thus, the other options do not accurately describe a process that occurs without additional energy input.