Which physical quality is illustrated by the ability to move quickly and change direction effectively?

Agility is defined as the ability to move quickly and change direction with precision. This physical quality is crucial in various sports and physical activities where rapid changes in movement or position are necessary, such as in basketball, soccer, and tennis. Agility involves coordination, balance, speed, and the ability to anticipate and respond to changes in the environment effectively. It combines both physical speed and mental awareness, enabling an individual to perform complex movements smoothly and efficiently.

The other options represent different physical qualities: strength pertains to the ability to exert force, endurance relates to the sustained effort over time, and flexibility refers to the range of motion in joints and muscles. While these qualities are important in their own right, they do not encompass the essence of moving quickly and changing directions effectively as agility does.