All insects contain 4 parts: 6 legs, 3 body parts, an exoskeleton, and a antenna. Some insects have additional parts that are compound eyes, and wings.
Most insects have the ability to camouflage themselves. This means they can blend into the resources around them so they can attack their predator, or not be attacked by another insect.
Lastly, insects are so successful because their legs are adapted for springing, running, swimming, digging and grasping. Having these legs helps the insects escape from predators, and catch their prey.
I also learned that cockroaches have 6 legs, and when they cockroaches move, the left front leg and the right middle leg move at the same time and vise versa.