Insects create the biological foundation for all terrestrial ecosystems. They cycle nutrients, pollinate plants, disperse seeds, maintain soil structure and fertility, control populations of other organisms, and provide a major food source for other taxa.

What would happen if there were no bugs?

Many insects use wings to fly around. ... Some animals, like small birds, frogs and other reptiles and amphibians, survive almost entirely on an insect diet. If there were no bugs for these animals to eat, they would eventually die off. That, in turn, would eliminate the food source for other animals farther up the chain.

How are insects helpful to humans?

Insects provide useful services to mankind and the environment in a number of ways. They keep pest insects in check, pollinate crops we rely on as food, and act as sanitation experts, cleaning up waste so that the world doesn't become overrun with dung.