In physics, a is a group of related objects that interact with each other and form a complex whole.

The answer is System.

Explanation:

A system is an ordered set of rules, procedures and related elements that regulate the operation of a group and that function as a whole; It is a complex object whose parts or components relate to at least some of the other components. All systems have composition, structure and environment,

hello there!

your answer is a “generator”

a generator does not create energy but instead it transforms it.

it’s basically a motor working in reverse.