Which activity can tend to lower the water table?a.Overgrazingb.Human population growthc.Soil erosiond.Over extraction of groundwater

To determine which activity can tend to lower the water table, let's analyze each option step by step:

a. Overgrazing:

• Overgrazing occurs when animals feed on plants excessively, preventing vegetation from recovering.
• This can lead to soil erosion and reduced soil quality, but it does not directly lower the water table.

b. Human population growth:

• An increase in human population can lead to higher water consumption.
• However, population growth itself is not a direct activity that lowers the water table; it is the associated activities (like increased water usage) that have an impact.

c. Soil erosion:

• Soil erosion is the removal of the topsoil layer due to wind, water, or human activity.
• While it affects soil quality and can lead to reduced water infiltration, it does not directly lower the water table.

d. Over extraction of groundwater:

• Over extraction of groundwater involves pumping water from underground aquifers at a rate faster than it can be replenished.
• This directly lowers the water table as the water level in the aquifer decreases.

Based on the analysis, the activity that can tend to lower the water table is:

d. Over extraction of groundwater