The correct answer is D.
A drought is a natural disaster which consists on a lack of rain during a very extended period of time. Therefore, this weather phenomenon can severly affect natural resources, such as drinkable water reserves, agricultural raw materials or energy resources as, for instance, hydroelectric power if water lakes are totally dry.
A lack of resources may limit the functioning of the economy as, it might not be able to produce enough goods and services to appropiately satisfy the needs of its citizens.