Why has groundwater use increased?
a. the total amount of freshwater has decreased
b. more of the available freshwater is stored in glaciers and icecaps
c. governments have banned the use offreshwater in rivers and springs
d. the demand for freshwater has increased due to population growth

The correct answer is - d. the demand for freshwater has increased due to population growth.

The freshwater is not evenly redistributed across the world. While some places have abundance of it (like England), some don't even have a single drop of freshwater (like Saudi Arabia).

The population in the world is on a constant rise, so more people means more freshwater is needed. Because some areas do not have enough water for their population to be satisfied, they have turned to using the groundwater, and in the past decades that has led to draining a lot of groundwater reservoirs, which in turn causes problems with sinking ground, and cracks in the ground etc.