The Great Lakes region is a major source of fresh water and home to a diverse group of plants and animals. Which of these factors could disturb the stability of the ecosystem?
Responses
A A decrease in fishing throughout the Great Lakes region.A decrease in fishing throughout the Great Lakes region.
B A slowdown of clear cutting and construction in the area.A slowdown of clear cutting and construction in the area.
C Normal snowfall in winter, ensuring that water levels remain normal.Normal snowfall in winter, ensuring that water levels remain normal.
D The disappearance of a keystone species due to an increase in water temperature.