What are the different strokes used in swimming, and how are they executed?

Swimming strokes vary in technique and are used for different purposes. The four primary strokes are freestyle, backstroke, breaststroke, and butterfly. Freestyle is the fastest stroke and is characterized by a flutter kick and alternating arm movements. Backstroke involves swimming on the back, with an alternating arm movement similar to freestyle. Breaststroke is characterized by a frog-like kick and simultaneous arm movements, executed in a circular motion. Butterfly is the most challenging stroke, involving a dolphin kick and simultaneous arm movements over the water. Each stroke requires proper technique and coordination for efficient propulsion through the water.