Insects are very important to the ecosystem. Here’s a few examples:
* Ants, flies, and many other insects help accelerate decomposition of dead things, which converts it into compost/fertilizer faster. Without them, forest floors could get so covered in decaying matter that plants couldn’t grow.
* Burrowing insects can help aerate soil.
* Many birds and other animals have diets that consist solely of insects and there’s not another food source plentiful enough to keep them alive.
* Some insects like bees are crucial for many plants’ pollination.
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