Which shooting stance is characterized by feet shoulder-width apart?

The modified isosceles stance is characterized by having the feet shoulder-width apart, providing a solid and stable base for shooting. This stance allows for better control and balance while aiming and firing. In this position, the shooter stands upright with the body squared to the target, which can help to manage recoil effectively and align the sights accurately.

In contrast, the other options vary in body positioning and foot placement. The weaver stance, for example, typically involves having one foot further back than the other, creating an angled position rather than the shoulder-width spacing seen in the modified isosceles stance. The isosceles stance, while similar, does not specifically emphasize the foot placement beyond maintaining balance; it allows for full use of both arms in a forward position, but the feet may not necessarily be shoulder-width apart. The prone position, on the other hand, involves lying flat on the ground, which does not apply to the concept of feet placement in a standing shooting stance.