The Correct Answer and Explanation is:1
The correct answer is very well-sorted; well-rounded.
Wind-blown sand deposits, also known as eolian deposits, are characterized by their distinct textural properties which result from the nature of wind as a transport agent. These properties are sorting and rounding.
Sorting refers to the degree of uniformity in the size of the grains within a deposit. Wind is an exceptionally effective sorting agent because its ability to move sediment is very sensitive to particle size and weight. It can easily pick up and transport fine to medium-sized sand grains, while leaving heavier particles like pebbles and gravel behind. Lighter particles, such as silt and clay, are often carried much farther away in suspension. As a result, the sand that accumulates in wind-blown environments like deserts and coastal dunes consists of grains that are nearly all the same size. This high degree of size uniformity is described as being very well-sorted.
Rounding describes the smoothness of the corners and edges of the sediment grains. When wind transports sand, the grains travel by saltating, which means they bounce and skip along the ground. During this process, the grains repeatedly collide with each other and with the ground surface. Because air is much less dense than water, these collisions are high-energy impacts that are very effective at chipping away at any sharp, angular edges. Over the distance of transport, this constant abrasion grinds down the corners, making the grains progressively smoother and more spherical. This process results in well-rounded grains.
Therefore, the combination of excellent size-based selection and high-impact grain-to-grain collisions during transport makes wind-blown sand deposits most likely to be both very well-sorted and well-rounded.