Answer:
groundwater is pumped from the well faster than it can flow to replenish what is lost
Explanation:
The cone of depression in the groundwater is formed when "groundwater is pumped from the well faster than it can flow to replenish what is lost."
The pumping of the well, reduces the water level in the well, thereby leading to a gradient shape between encircling aquifer water and the well water. The gradient in turn causes a flow from the encircling aquifer into the well.
During the flow, the water pressures in the aquifer reduce, which eventually form a cone-shaped depression off the well.