Name insects known to you with incomplete transformation and what role they play in nature.

Incomplete transformation – Dragonfly Squad; Order Orthoptera.
Their role in nature: approximately 91% of flowers are pollinated by insects; soil insects and their larvae, which feed on dead parts of plants, are of great importance, they dig tunnels in the soil, making the soil loose, enrich it with oxygen and accelerate the formation of humus; also insects are food for animals, fish, amphibians, reptiles, birds, are important links in natural food chains; predatory insects, destroying adult insects and their larvae, regulate their numbers in nature.