How does the presence of a variety of trees help our water quality? (choose all that apply)

A. causing run-off and chemical buildup

B. gradually increasing groundwater (regulating the flow of water)

C. natural filtration

B. gradually increasing groundwater (regulating the flow of water)

C. natural filtration

The presence of a variety of trees helps our water quality primarily by:

B. Gradually increasing groundwater (regulating the flow of water): Trees act as natural sponges, absorbing and storing significant amounts of water in their roots and releasing it over time. This process helps regulate the flow of water, preventing rapid runoff and allowing a gradual recharge of groundwater.

C. Natural filtration: Trees play a crucial role in filtering pollutants and sediment from water. As water moves through the soil, tree roots and their associated microorganisms help break down and absorb harmful substances, filtering the water and improving its quality.

Therefore, options B and C, "gradually increasing groundwater" and "natural filtration," are the correct choices that explain how the presence of a variety of trees helps our water quality. Option A, "causing run-off and chemical buildup," is incorrect as trees actually help reduce runoff and the accumulation of harmful chemicals in water sources.