Question

which of these is a source of potential (stored) energy? wind rain coal

Explanation:

To determine the source of potential (stored) energy, we analyze each option:

• Wind: Possesses kinetic energy due to its motion, not stored energy.
• Rain: Has kinetic energy as it falls and also involves gravitational potential energy during its cycle, but the primary form here isn't stored energy in the context of a primary source.
• Coal: Contains chemical potential energy stored within its molecular structure from ancient organic matter, making it a source of stored (potential) energy.

Answer:

coal (the option with "coal" as the text)