Question

100 POINTS)Which change is an environmental effect of building dams?

A) increased fertility downstream
B) weed growth upstream
C) sediment builds up downstream
D) increased water temperature upstream

Answer 1

weed growth upstream

Step-by-step explanation:

When dams are build up on a river the water at upstream rises .

Buliding dams also have some other side effects like dieing of fishes ,quick floods etc .

Option B