Question

overuse of groundwater can lead to which of the following? flooding subsidence or \sinkholes\ nutrient pollution

Explanation:

Over - using groundwater causes the soil and rock layers above to collapse due to loss of support, leading to subsidence or sinkholes. Flooding is usually due to excessive surface water, and nutrient pollution is related to runoff of fertilizers etc. not directly to groundwater over - use.

Answer:

subsidence or "sinkholes"