How are sand grains transported by the wind?

A. by being picked up in swirling dust clouds and carried to distant blowouts.
B. by saltation in the first few meters above the land surface.
C. by deflation of abraded desert pavement high in the moving air column as suspended load

Option B, by saltation in the first few meters above the land surface

Explanation:

In the process of saltation, sand is carried by air and the sand grains remains suspended for a small distance till the fall down. These sand grains form a parabolic trajectory before falling down. The other characteristics such as height and time of suspended grains depends on grain size, shape, and density, lift  & drag force and characteristics of wind such as velocity and turbulence.  

Hence, option B is correct

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

c. live where it’s cold and icy