Concept:Slow downhill movement of soil gradually distorts objects resting on or in it.
Explanation:Soil creep is a slow mass wasting process.
It moves the soil layer down a slope at a very gentle rate.
The upper soil moves slightly faster than the deeper soil.
This difference causes trees and poles to tilt downhill over time.
Trees keep growing upward, so their trunks become curved.
Telegraph poles lean because the soil supporting them shifts slowly.
Rapid processes like rock fall, earth flow, and mud flow do not create this gradual curving or leaning effect.
Answer:C. Soil creep