Question

overpopulation can affect the natural environment by limiting land available for crops. lowering the standard of living. causing the destruction of forests. worsening sanitation in cities.

Explanation:

Overpopulation often leads to more land - use for housing and other human needs. This can result in deforestation as forests are cleared for human settlement, agriculture expansion, etc. Limiting land for crops mainly affects food production rather than the natural environment in the broadest sense. Lowering the standard of living and worsening sanitation in cities are more about social and urban issues rather than direct natural environment impacts compared to forest destruction.

Answer:

causing the destruction of forests.