Question

what is a major risk associated with groundwater use? it can evaporate leaving sediment behind. it can become over run with algae. it can be contaminated by pollutants.

Explanation:

Groundwater is vulnerable to pollution from various sources like industrial waste, agricultural chemicals, and improper waste disposal. Evaporation leaving sediment is more related to surface water in arid areas. Algae overgrowth is typically a surface - water issue (e.g., in lakes) due to nutrient loading. Contamination by pollutants is a major and well - known risk for groundwater.

Answer:

It can be contaminated by pollutants.