Question

in order to use biomass as a source of energy it must be select one: a. refined for a period of time. b. converted to oil. c. burned. d. converted to natural gas.

Explanation:

Biomass is a renewable energy source. The most common way to use it for energy is through combustion. Burning biomass releases the stored chemical - energy as heat, which can be used for various purposes like heating or generating electricity. It doesn't necessarily need to be refined for a period of time, converted to oil or natural gas to be used as an energy source.

Answer:

C. burned