Which Option Correctly Describes an Effect of Human Activity on a River

question 19

Multiple Choice

Which option correctly describes an effect of human activity on a river channel?

• A) If logging and clearing have increased the sediment load, the channel may fill and the banks may become higher.
• B) If logging and clearing have increased the amount of runoff, the channel may fill and the banks may become higher.
• C) If agriculture and building have decreased the amount of runoff, the channel may erode further and the banks will become lower.
• D) If agriculture and building have increased the sediment load, the channel may erode further and the banks will become lower.