Question

Driving along mountain roads you sometimes see signs that say "Watch for falling rocks." This warning is about which type of erosion?

gravity

wind

water

glacier

Answer 1

Gravity, or A, since gravity is pulling the rocks down off of the mountain.

Answer 2

Mostly water erosion. Snow melts at the top of mountains and trickles down a mountainside. This loosens and erodes rocks, leading to unstable stones.