Question

give reason: crabs hava a tough outer shell ​

Answer 1

Answer:

hope this is helpful

Explanation:

The crab's shell helps to protect it, like a suit of armour. As long as it is wearing its armour, the crab cannot grow. It has to get rid of its shell, and grow a new one, in order to get bigger. Crabs and lobsters have tough shells that help to protect them.

Answer 2

Answer:

The crab has its skeleton on the outside, in the form of a shell. The crab's shell helps to protect it, like a suit of armour, Crabs and lobsters have tough shells that help to protect them.