For one thing, it has a special body. All insects have a hard shell on the outside called an exoskeleton. The shell protects the little insect just like metal armor protects a knight. People live together in groups called families.
Some insects live together in groups, too.
Ants, bees, and termites live in groups called colonies. Each member of an insect group has a special job. Some find and gather food. Some build and dig. Others take care of the young.