Answer:
B. Asia
Step-by-step explanation:
Asia is the home to 60% of the world's population with only 36% of the freshwater available for this continent population. West Asia faces the greatest threat were over 90% of the population facing serious water stress. poor water quality and bad sanitation are common problems in this region. As many experts say in the coming future the freshwater resources and crisis will become a major reason of wars between countries.