'It is crescentic or moon-shaped and occurs transversely to the direction of the prevailing wind'. The above statement is a description of a

The description 'crescentic or moon-shaped and occurs transversely to the direction of the prevailing wind' refers to a barchan. A barchan is a type of sand dune that is crescent-shaped and has horns that point in the downwind direction. Barchans are formed by the action of wind, which blows sand particles across the desert floor and deposits them on the upwind side of the dune. As the sand accumulates, it forms the crescentic shape of the dune. Barchans migrate across the desert, with the horns pointing in the direction of the prevailing wind.