Which of the following is not a component of a horse's foot?

The correct choice is based on the anatomical structure of a horse's foot. The crown refers to the uppermost part of the hoof, where the hoof meets the hairline. It plays a crucial role in the overall health and structure of the hoof. The frog is a vital part of the hoof that acts as a shock absorber and aids in circulation within the hoof. The sole is the underside of the hoof that protects the internal structures and provides support for the horse.

In contrast, the term "beam" does not refer to any recognized structure within a horse's foot anatomy. It does not represent a component of the hoof or foot, making it the correct answer for the question regarding which item is not part of a horse's foot. Understanding these components is essential in the care and management of horse health, particularly for preventing and treating hoof-related issues.