Based on your understanding of the terms proximal and distal, the distal sesamoid bone in the equine leg would be expected to have which relationship to the proximal sesamoid bone found on the same leg?

Distal sesamoid bone is closer to the hoof than the proximal sesamoid bone.    

The distal sesamoid bone is closer to the hoof than the proximal sesamoid bone.

Explanation:

A part is said to be at a proximal position if it lies closer to the point of attachment in the body. If a part is situated at a position away from the point of attachment of the body then it is said to be at a distal position. Equine is a horse, in the equine leg, the point of attachment begins to form the scapula and then the legends in the hoof.From the term proximal and distal it is clear that the proximal sesamoid bone will be closer to the scapula and the distal will be closer to the hoof of the leg.

It should be cryosphere and hydrosphere