Answer:
subtropical high pressure
Explanation:
Many desert areas are caused by subtropical high pressures. Such areas are consistently warm, dry and also sunny. And are the Arabian desert in the middle east and in Africa, the Sahara desert. It is also called the horse latitude and have it's latitudes between 30 and 35 degree in the north and south. Rainfall is supposed and winds is variable with calm winds sometimes.
Global water supply is currently a troubling issue. The world's population size is steadily increasing, without the increase in water supply, leaving many to fear an impending shortage.
Freshwater is not evenly distributed across the globe and desalination of water is one solution put forth, but it also comes with its own challenges such as: being very expensive, requiring large amounts of energy, harsh impact on marine life, water being a commodity controlled by large corporations, and emissions having a harsh effect on environments.
Answer: The correct answer is C. DIFFUSION