What is the white strip covering the coronary band known as?

The white strip covering the coronary band is known as the coronet. This is the area where the hairline of the horse's leg meets the hoof, and it plays a crucial role in the growth of the hoof wall. The coronet is significant because it produces the hoof wall, which is vital for protecting the sensitive structures within the hoof and providing support to the horse as it moves.

In the context of the other options, the pastern refers to the part of the leg between the fetlock and the hoof, serving different anatomical functions. The fetlock is the joint located just above the hoof, while the hoof is the hard, protective structure that encases the distal part of the horse's limb. Each of these anatomical terms refers to different structures in the horse's leg, but only the coronet specifically denotes the white strip at the coronary band.