Final answer:
The action of a snake shedding its skin frequently is an example of a physical adaptation which allows for growth, removal of worn skin, and elimination of parasites, aiding in its survival and reproduction.
Step-by-step explanation:
When a snake sheds its skin, this process is an adaptation for several reasons. First, it allows the snake to accommodate its continuous growth throughout its life. Second, shedding or molting helps the snake to rid itself of old and worn skin. Finally, it is also essential for hygiene, as it enables the snake to remove ectoparasites like mites and ticks that might be attached to its old skin. Such adaptations are essential as they enhance the snake's ability to survive and reproduce in its environment. This process is similar to other organisms which have adapted unique features to suit their environments, like the cheetah's speed for hunting or the snow leopard's thick fur for insulation in cold weather.
Adaptations are a result of evolution by natural selection, which helps organisms better 'fit' their environment. This fit is not static but changes as the environment does, ensuring the survival and reproductive potential of the species involved. For snakes, the regular shedding of skin is an excellent example of a physical adaptation that has become an integral part of their life cycle.