One reason alternative energy sources are needed is because A. the energy needs of the world are decreasing
B. there is no limit to the supply of fossil fuels
C. the population of the world is decreasing
D. the supply of fossil fuel is diminishing

D.) the supply of fossil fuel is diminishing

Explanation:

Unlike other resources, fossil fuels are not renewable, so it doesn't take long to run out.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.