I have been trying to pick up swimming lately. Have you tried it?
Sure. I do some swimming. It is basically the self-propulsion through water.
I see, are there different kinds of swimming techniques? 
There is the freestyle and butterfly. People usually swim for recreation, exercise, sport, and even survival.
Yea I read lately about a lady who had to swim for 12 hours to survive in the ocean before being rescued. 
That is incredible. In some countries swimming lessons is part of some kids curriculum in education. It really can save your life.
I agree, swimming should be compulsory for all kids. I can't imagine going on a boat ride knowing I can't swim.
local, national, and international competitions, including every modern Summer Olympics.
Science.
Swimming relies on the nearly neutral buoyancy of the human body. On average, the body has a relative density of 0.98 compared to water, which causes the body to float. However, buoyancy varies on the basis of body composition, lung inflation, and the salinity of the water. Higher levels of body fat and saltier water both lower the relative density of the body and increase its buoyancy.
Since the human body is
Swimming
Swimming is the self-propulsion of a person through water, usually for recreation, sport, exercise, or survival. Locomotion is achieved through coordinated movement of the limbs, the body, or both. Humans can hold their breath underwater and undertake rudimentary locomotive swimming within weeks of birth, as a survival response.
Swimming is consistently among the top public recreational activities, and in some countries, swimming lessons are a compulsory part of the educational curriculum. As a formalized sport, swimming features in a range of