What do snail do with their apex?

The apex of a snail refers to the topmost part of its shell, which is formed as the snail grows. Snails use their shells primarily for protection against predators and environmental conditions. The apex, being the oldest part of the shell, provides structural stability and contributes to the overall shape, helping the snail to retreat into its shell when threatened. Additionally, the shell can assist in moisture retention, which is vital for the snail's survival.