If logging operations are conducted on a hillside near a river, the operations will most likely - A. increase the number of organisms in the river
B. increase the amount of sediment in the river
C. decrease the rate of runoff from the hillside
D. decrease the amount of erosion along the hillside

D. decrease the amount of erosion along the hillside

Explanation:

When logging operations are conducted on a hillside near a river, the operations will decrease the amount of erosion along the hillside because the tree's root hold soil particles and does not allow them to erosion. We can see in many region that there is presence of vegetation on the bank of river or stream in order to prevent erosion of soil so that's why we can say that logging operations causes decrease erosion along hillside.