A crescentic depositional feature found in desert mice is

Analyze the question: The question asks for a crescent-shaped feature formed by deposition in deserts. ("Desert mice" is most likely a typo for "desert areas".)

Explain the concept: Desert landforms are either made by erosion (wearing away) or by deposition (build-up of sand).

• Rock pedestal: an erosional feature. Wind abrasion wears away the base of a rock, leaving a mushroom-like shape.
• Zeugen: an erosional feature. Hard rock layers sit on softer layers that are worn away, leaving table-like ridges.
• Yardang (written "Yangdang" in the option): an erosional feature. Wind scours the rock into streamlined ridges aligned with the wind direction.
• Barchan dune: a depositional feature. Sand piles up into a crescent shape.

Solution:

1. The question asks for a depositional feature, so A, B and C are ruled out because they are all formed by erosion.
2. A barchan is a crescent-shaped sand dune. Its horns (tips) point downwind. It has a gentle windward slope and a steep leeward slope (the slip face).
3. Barchans form where sand supply is limited and the wind blows steadily from one direction.

Answer: The correct option is D. Barchan dune.

Exam tip: Remember "Barchan = Bow or crescent shape = Built up (deposited)". Whenever you see "crescent" and "deposition" together in a desert question, think barchan. Also, rock pedestal, zeugen and yardang are all erosional features, so they are the usual distractors.