Respuesta :
I believe the best answer is A.
People are more afraid in fossil fuels running out rather than the other reasons that don't really affect the people today. Hope it helped!!!
Answer:Fossil fuels may one day run out.
Explanation:
Fossil fuels supply most of the energy for our use on Earth. But gasoline and other fossil fuels are non-renewable natural resources. This means that fossil fuels may one day run out.