Describe the snail.

A snail is a small, soft-bodied animal that has a hard outer shell covering its body. This shell protects the snail from danger but does not help in its movement. The snail can come out of an opening in the shell when needed. It moves using a muscular structure called the foot, which is located on the underside of its body (belly). The snail moves very slowly in a wavy motion by contracting and relaxing its muscles.