The erosion may be physical and include rain, surface water runoff such as streams, the seasonal freezing and thawing of rocks, or wind.
(The erosion; may be; physical) (The erosion; include; rain, surface water runoff such as streams, the seasonal freezing and thawing of rocks, or wind)
The erosion The erosion
may be include
physical
rain, surface water runoff such as streams, the seasonal freezing and thawing of rocks, or wind