How do weathering and erosion change landforms over time?

A. they tear them down
B. they build them up
C. they make them prettier
D. they do not change them much

my answer is b,am i right?

No, not correct. Did Erosion build up the Grand Canyon?

How does erosion build up landforms?

Why are the older mountain ranges shorter than the younger mountain ranges?

is the answer a?

Right. The answer is a.

Yes, you are correct. Weathering and erosion change landforms over time by building them up or shaping them.