The gymnastics event that involves the use of a beam is the balance beam. This apparatus tests a gymnast's agility, balance, and precision as they perform routines consisting of various movements, including jumps, turns, and dismounts. Competitors execute their skills on a narrow 4-inch-wide beam elevated off the ground, making it challenging to maintain composure and control. Scoring accounts for the difficulty of the routine and execution quality, emphasizing both artistry and technical skill.