Question

which landform is created by river erosion over millions of years?
plateau
canyon
delta
glacier

Explanation:

Canyons are formed by the continuous erosion of river water over long - periods like millions of years. Plateaus are formed mainly by tectonic uplift or volcanic activity. Deltas are formed by sediment deposition at the mouth of a river. Glaciers are formed by the accumulation and compaction of snow over time.

Answer:

B. Canyon