Which of the following muscles is located on the front end of the horse?

The forearm is considered to be on the front end of the horse as it is part of the forelimb structure, specifically located between the elbow and the knee (carpus) of the horse. This area contains muscles that are crucial for the horse's movement, particularly in relation to the forelimb's function during walking, trotting, and galloping. The strength and condition of the forearm muscles can greatly influence the horse's overall performance and athletic abilities.

In contrast, the stifle, gaskin, and withers are located in different regions of the horse's body. The stifle is situated at the junction of the femur and tibia in the hind leg, acting as a hinge joint, while the gaskin is found on the hind leg between the stifle and the hock. The withers are located at the top of the horse's back, just above the shoulder blades. Understanding the anatomy of these areas helps in the evaluation of a horse's physical condition, movement, and performance.