Final answer:
The subject of this question is Geography, specifically the concept of groundwater and the water table.
Step-by-step explanation:
The subject of this question is Geography. Specifically, it relates to the concept of groundwater and the water table. Groundwater is a significant, subsurface reservoir of fresh water that exists in the pores between particles in dirt, sand, and gravel or in the fissures in rocks. The water table is the boundary between the unsaturated zone and saturated zone, and it rises and falls with the topography and rainfall.