The minimum age to obtain one's driverâs license should not be raised to 18 because 16-year-olds have a much more focused mind. If you change the minimum driving age to 18, it will be very little different from 16-year-olds because either way they wouldn't have very much driving experience.
Snails make their own shells.They make it with a muscle called the mantle.The mantle then releases liquid.When the liquid hardens it forms the shell.Later in the snails life t â¦ he mantle releases more liquid and the shell becomes bigger.
The operculum (or âdoorâ) of the living snail is thick, white, and calcareous with deep grooves on the exterior surface. The shell has about four whorls. The roundness of the large body whorl helps it earn its place as a member of the Moon Shell family.he color of a fresh specimen is variable, consisting of spiralling chestnut-colored bars alongside four spiralling white bands, with dark brown or purplish zigzag markings on a yellowish-or bluish-white background (except for the basal area of the shell, which is white).