Question

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

Explanation:

Biomass is an organic material from plants or animals. To use it as an energy - source, the most common way is to burn it to release heat energy. Biomass is not typically converted to natural gas or oil as a standard way of using it for energy, and it doesn't need to be refined for a period of time to be used as an energy source.

Answer:

D. burned