Question

Anyone wanna write a short expository paragraph about why turtles have shells?

Answer 1

Shells evolved from ribs. ... Turtles and other shelled creatures use shells like shields to protect themselves from predators, or animals that hunt them. Turtles probably needed a shield on their backs and stomachs because they faced predators in the ocean from both above and below.

Answer 2

Turtles have shells evolved from ribs.  Turtles and other animals with shells use their shells like shields to protect themselves from predators, or animals that hunt them. Turtles needed a shield on their backs and stomachs because they faced predators in the ocean from both above and below.