Which feature might result where wind erosion acts on a resistant rock layer overlying a softer rock layer?

The correct answer is - Yardang.

Explanation:

When the wind in a region exposed to rock and cause erosion on a resistant rock layer overlying a soft layer, it results in a sharp irregular ridge structure called yardang due to the soft adjacent rock layer.

It is the same as if you pile up the feathers on the rocks and blew, Rock will stay the same while feathers will be blown away.

Thus, the correct answer is - Yardang.