The agility of the body of the athlete was very much appreciated by the spectators.

Answer: Option A

Briskness : Marked by speed, liveliness, and vigor; energetic.
Suppleness : bending readily without breaking or becoming deformed.
Alertness : the quality of being alert.
Sprightliness : animation and energy in action or expression
Agility : ability to move quickly and easily.

Synonym of Agility is Briskness