The population of frogs in a pond ecosystem is increasing. the population of flies will most likely do what?

The population o flies will most likely decrease significantly until the balance is achieved again. The increase of frogs will trigger their predators` population as a consequence and the frogs' number will be reduced, then the frog predators won't have enough frog and will move to the next pond. Then the flies' numbers will increase, and the cycle will repeat itself.

Explanation:

First of all, we need to understand something, ecosystems will always produce life and if the balance of predators and prey is broken. Life will find its way. as I have said before, the number prays will trigger significantly the number of predators, in our case, the decrease of flies will be solved by the increase of frog predators that the ecosystem will get. Then, when there are enough frog predators to reduce the number of frogs to a very tiny level in which predators have to leave to find another pond. The population of flies will recover its staggering numbers.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.