What is the purpose of wearing a wetsuit while diving?

Wearing a wetsuit while diving serves the primary purpose of providing thermal insulation and protection from marine life. A wetsuit is made of neoprene material, which traps a thin layer of water between the suit and the skin. As the diver's body temperature warms this layer of water, it helps maintain warmth even in cold water conditions. This insulation is crucial for preventing hypothermia, especially during prolonged dives in cooler environments.

Additionally, the wetsuit offers protection from potential hazards in the marine environment, such as sharp coral, jellyfish stings, and other marine organisms that could cause injury. The thickness and coverage of the wetsuit help reduce the risk of scrapes and cuts, making it an essential piece of equipment for safe diving practices.

The other options address aspects that do not primarily define the purpose of a wetsuit. While visibility, buoyancy, and air supply efficiency are important factors in diving, they do not relate to the main function of a wetsuit.