The correct answer is D. Swimming.
The butterfly stroke is one of the four competitive swimming strokes. It is the fastest of the four strokes and is the only stroke in which the swimmer’s arms move simultaneously. The butterfly stroke is a difficult stroke to learn and master, but it is a very efficient stroke that can be used to swim long distances.
The butterfly stroke is a relatively new stroke, having been developed in the early 1930s. It was originally called the “dolphin stroke” because of the way the swimmer’s arms move, but it was later renamed the “butterfly stroke” because of the way the swimmer’s body undulates through the water.
The butterfly stroke is a very demanding stroke, both physically and mentally. It requires a great deal of strength and endurance, as well as good coordination and timing. The butterfly stroke is also a very technical stroke, and it is important to have good technique in order to swim it efficiently.
The butterfly stroke is a very popular stroke, and it is often used in competitive swimming. It is also a popular stroke for recreational swimming, and it is a great way to get a full-body workout.
The other options are incorrect because they are not sports in which the term “butterfly stroke” is used. Tennis is a racket sport that is played between two or four players. Volleyball is a team sport in which two teams of six players are separated by a net. Wrestling is a combat sport that is practiced both as a form of physical exercise and as a competitive sport.