A. Makes the selection edges sharp
B. Blurs the edges of the selection to create a smooth transition
C. Deletes the selection
D. Changes the selection to a different color

Solution

B. Blurs the edges of the selection to create a smooth transition

Explanation

Feathering a selection softens the edges by creating a gradual transition between the selected area and the surrounding pixels. This helps in blending the selection more seamlessly with the rest of the image.