Would it be d? ? and thanx! apex

No,your answer is B.

We are talking about fossil fuels,we are trying to see how carefully we should use them. Coal,and natural gas are fossil fuels we should be paying attention to how much of it we use so we can be able to survive. If you are asking why it is SO important, it takes MILLIONS of years for it to form so we can be provided with what we need.

Hope this helps! :D

(P.S. can I be marked brainliest?)