<em>Do not pick the other answer, it is incorrect!</em>
The correct answer is:
Cyst
Explanation:
The glow-worm begins its life in the autumn as a pale yellow egg. The freshly laid egg is extremely fragile but within a day its surface has hardened into a shell.
The answer is C. It's kind of like how humans speak in different languages. So do birds. They may make different noises but they are all still birds.
