Question

why the work of wind limited to a few metres above the ground​

Answer 1

$\huge\underline\purple{Answer:-}$

Wind carries with it large amount of dust particles, sand and gravel, these loose materials help in eroding the rocks. The work of wind is restricted to few meters above the ground because it unable to carry rock particles up in the air. Near the ground it works slows down due to friction with the surface.