Only an agile person can be a successful sportsman.

Answer: Option D

Agile : able to move quickly and easily.
Brisk : active and energetic.
Emaciated : abnormally thin or weak, especially because of illness or a lack of food.
Feeble : lacking physical strength, especially as a result of age or illness.
Sluggish : slow-moving or inactive.

Antonym of Agile is Sluggish