How do insects reproduce and develop?

Insects reproduce by laying eggs on plant leaves. But their larvae develop in different ways. A butterfly larva is a caterpillar that is very different from an adult butterfly. The caterpillar feeds on plant leaves and once turns into a pupa, which hangs motionless in a cocoon. After a while, an adult butterfly appears from the cocoon.
The larva of a grasshopper, which also emerges from an egg, is already in childhood similar to an adult Kuanechik, but without wings. The larva gradually grows, shedding the skin each time. When the grasshopper larva sheds its skin for the last time, then an adult grasshopper emerges from it.