Multiple choice

Which of the following animal/s have an outer skeleton?

  1. Snail

  2. Snake

  3. Earthworm

  4. Squid

  5. Octopus

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Correct. The outer skeleton of the snail is the shell, which  is made up of calcium carbonate. The snail pulls this shell along as it moves. The snail can even hide its head inside the shell.