Why does the process of mass wasting occur faster on a steep slope?

a.
steep slopes are slippery.

b.
the force of gravity causes mass wasting to occur faster.

c.
mountains have a lot of rainfall.

d.
landslides always move quickly.

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire