(a) Loess
(b) Talus
(c) Drift
(d) Sand dunes
Ans :- (a) Loess

Explabation :-
Loess is transported by wind.

• Loess is an aeoline soil they formed in air and semi-arid regions.
• These deposit have low density and high compressibility, the bearing capacity of such soils is very low.
• The permeability in the vertical direction is large.