Final answer:
Reversible processes are operations that can return a system and its environment to their original states, showcasing energy conservation and reversibility.
Explanation:
Reversible processes are a series of operations that can bring both the system and its environment back to their original states. These processes demonstrate that the system can be restored to its initial conditions without any energy loss or change in the environment. For example, the cyclical process is a type of reversible process where the system returns to its original state at the end of each cycle.
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