Question

due to decreased light penetration, which area of rivers and streams will have less diversity of plant life? a. the source b. the mouth c. the middle portion d. none of the above

Explanation:

Plants need light for photosynthesis. In the mouth of rivers and streams, there is often more sediment, turbidity, and other factors that can decrease light penetration, limiting plant growth and reducing plant - life diversity.

Answer:

b. the mouth