Question

renewable fuels derived from biological matter are called: a. challenges to green design. b. fossil fuels. c. biofuels. d. alternative energy.

Explanation:

Biofuels are fuels made from biological matter and are renewable. Fossil fuels are non - renewable and from ancient organic matter. Alternative energy is a broad term and not specific to biological - matter derived fuels. Challenges to green design are not related to the definition of these fuels.

Answer:

C. biofuels