Question

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

Explanation:

Groundwater can be infiltrated by pollutants from sources like industrial waste, agricultural chemicals, and sewage. These pollutants can contaminate the groundwater making it unsafe for use. Algae over - growth is more common in surface water bodies, and evaporation leaving sediment is a natural process not a major risk associated with groundwater use.

Answer:

It can be contaminated by pollutants.