The parent material constituted by windblown transported material consisting of silt particles is known as

Correct option is C

The correct answer is (C) Loess

Explanation:
• Parent materials are classified based on the agent of transport (water, wind, gravity, or ice).
• Loess is a sedimentary deposit formed by the accumulation of wind-blown (Aeolian) silt.
• It typically consists of silt-sized particles (0.002 to 0.05 mm) and is often yellowish or buff in color. Loess deposits are usually non-stratified and can form steep vertical bluffs because the particles are somewhat cohesive.
• Soils developed from loess are generally very fertile, have excellent water-holding capacity, and are highly valued for agriculture (e.g., the Loess Plateau in China or the Midwestern US).

Information Booster:
• Aeolian parent materials include Loess (silt), Sand Dunes (sand), and Volcanic ash.
• Loess covers about $10\%$ of the Earth's land surface.
• Because it is wind-deposited, loess is usually very uniform in texture over large areas.

Additional Knowledge:
• Alluvium (Option A): Parent material transported and deposited by running water (rivers/streams).
• Colluvium (Option B): Material that has moved down a slope under the force of gravity (talus).
• Dune (Option D): Also an Aeolian deposit, but it consists of sand particles, which are larger and heavier than silt.