Question

which of the following is an advantage of using coal for energy? it has lots of impurities. it releases lots of pollution. it releases lots of useful heat. it produces lots of ash.

Explanation:

The other options describe negative drawbacks of coal energy: impurities, pollution, and ash production are all disadvantages. Releasing large amounts of useful heat is the key beneficial property that makes coal a usable energy source, as this heat can be converted to electricity or used for heating.

Answer:

C. It releases lots of useful heat.