<human>:  What are the similarities and differences between swimming and surfing?
<bot>: The similarities between swimming and surfing are that both activities involve being in the water and being physically active. The differences between swimming and surfing are that swimming is generally done in a pool or open body of water while surfing is typically done in the ocean with a surfboard. Additionally, swimming requires the use of a specific set of strokes and techniques, while surfing involves the combination of skillful maneuvering with the power of the waves.