Which of the following describes the coordination and speed of movement in dogs?

The term that best describes the coordination and speed of movement in dogs is agility. Agility refers to the ability of a dog to move quickly and easily, navigate obstacles, and change direction with precision. This skill is essential in various activities, including obedience training, dog sports, and working tasks where quick reactions and coordinated movements are necessary.

While hardiness refers to a dog's ability to withstand tough conditions and physical stress, and physical endurance relates to the stamina and ability to sustain prolonged activity, neither of these concepts focuses specifically on the coordination and quickness of movement. Dogfight tendency describes aggressive behaviors and is unrelated to movement efficiency. Thus, agility is the most accurate term to capture the essence of a dog's coordinated and swift movement.