Explain how the regulation of the number of insects, insectivores and birds of prey in the ecosystem of the mixed forest, if the number of insects increases

1) with an increase in the number of insects, the number of insectivorous birds increases
2) an increase in the number of insectivorous birds leads to an increase in the number of birds of prey
3) an increase in the number of birds of prey leads to a decrease in the number of insectivorous birds and an increase in the number of insects.

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