What type of event would involve the use of a box?

The correct answer highlights that steer wrestling and roping are events where a box is an essential piece of equipment. In steer wrestling, a box serves as a starting point for the horse and rider, providing a controlled environment for the contestant to make their move as they chase and wrestle the steer to the ground. Similarly, in roping events, the box is used to hold the calf or steer before it is released, allowing riders to time their roping techniques effectively right from the start.

This emphasis on the box is pivotal because it ensures that the steer's release is consistent and fair across competitors, maintaining the integrity of the event. In contrast, bull riding and bronc riding do not utilize a box; instead, they focus on the rider overcoming the animal's bucking without the need for a starting box. Team roping certainly uses a box, but since steer wrestling and roping encompasses both elements of this answer, it stands out as the most inclusive and contextually appropriate choice for events involving a box.