11. All of these are causes of soil erosion except one.
A. Fire
C. Water
B. Human and animal activities
D. Wind
12. Which is the most effective agent of erosion?
A. glaciers
C. water
B. gravity
D. wind
13. The process that moves sediments
A. Erosion
C. Dissolution
B. Fracture
D. Weathering
14. Landslides on mountain slopes show the force of
A. Gravity
C. Running water
B. Runoff
D. Wind
15. What makes the water muddy after a heavy rain?
A. The fine dust particles dissolved in water.
B. The gravel and sand carried by the water
C. The pebbles moved along with water.
D. The rainwater turned brown in color.
pasagot po need kona po ito(*_*)(*_*)​