The butterfly stroke is a swimming stroke in which the swimmer moves their arms symmetrically in a forward and backward motion while their legs undulate up and down.

The maximum number of swimmers that can compete in a single swimming event is 8.

The minimum age requirement for swimmers to compete in the Olympics is 18 years old.

Freestyle is considered to be the fastest swimming stroke because it allows swimmers to use any stroke they want.

The 1500-meter freestyle is a swimming event in which swimmers race over a distance of 1500 meters using the freestyle stroke.

Backstroke is a swimming stroke in which a swimmer lies on their back and moves their arms and legs in a symmetrical motion.

The 200-meter freestyle is a swimming event in which swimmers race over a distance of 200 meters using the freestyle stroke.

The butterfly stroke is a swimming stroke in which a swimmer moves their arms in a circular motion while their legs remain extended.

The 100-meter freestyle is a swimming event in which swimmers race over a distance of 100 meters using the freestyle stroke.

Breaststroke is a swimming stroke in which a swimmer moves their arms and legs in a symmetrical motion while keeping their head above water.

The 50-meter freestyle is a swimming event in which swimmers race over a distance of 50 meters using the freestyle stroke.

Breaststroke is also known as the 'sidestroke' because swimmers move their arms and legs in a symmetrical motion while keeping their head above water.

The 400-meter freestyle is a swimming event in which swimmers race over a distance of 400 meters using the freestyle stroke.

The butterfly stroke is characterized by a swimmer moving their arms in a windmill motion while their legs remain extended.

The 800-meter freestyle is a swimming event in which swimmers race over a distance of 800 meters using the freestyle stroke.