Question

what is true when comparing the use of coal and hydroelectric energy regarding their rate of renewal?
only coal is continually produced and renewed.
both are continually produced, but the rate at which they are renewed differs greatly.
only hydroelectric water is continually produced and renewed.
both are continually produced, and the rate at which they are renewed is similar.

Explanation:

Coal is a non - renewable resource. It takes millions of years to form. Hydroelectric energy is a renewable resource as water in the water cycle is continuously replenished. So, only hydroelectric water (in the context of hydroelectric energy production where water is used and is part of the renewable water cycle) is continually produced and renewed.

Answer:

Only hydroelectric water is continually produced and renewed.