Answer:
The population of sparrows would grow.
Step-by-step explanation:
Owls are predators of sparrows. For this reason, a balanced population of owls keeps the population of sparrows under control through predation. On the other hand, if owls did not exist, sparrows would multiply without the influence of predation, which would result in the rapid growth of the sparrow population.
Another important scenario to be talked about is that if the sparrows did not exist, the population of owls could fall, since they would be limited in feeding.