You will be given a definition of a task first, then some input of the task.
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Reversible process is the name of the process in which both the system and its environment can return to exactly the states they were in by following the reverse path.
Output:
What is the name of the process in which both the system and its environment can return to exactly the states they were in by following the reverse path?