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

The correct answer is A. briskness.

Briskness is the quality of being quick and lively. It is often used to describe someone’s movement or actions. For example, you might say that someone is walking briskly or that they are working briskly.

Suppleness is the quality of being flexible and easily bent. It is often used to describe someone’s body or muscles. For example, you might say that someone is very supple or that they have very supple muscles.

Alertness is the quality of being quick to notice things. It is often used to describe someone’s attention or awareness. For example, you might say that someone is very alert or that they have a very alert mind.

Sprightliness is the quality of being lively and energetic. It is often used to describe someone’s personality or behavior. For example, you might say that someone is very sprightly or that they have a very sprightly personality.

In the context of the question, the agility of the body of the athlete is most likely referring to the athlete’s ability to move quickly and easily. This is consistent with the definition of briskness, which is the quality of being quick and lively. The