Help me with this bio question

In a certain ecosystem owls are predators for mice. the owl population increases and they eat more mice this causes the mouse population to decrease what happens next? a.the birth of mice increases. b. the birth rate of owls increases c. the population of owls decreases d. the population of mice increases

Ineed to know why d is the correct answer asap

25. what does meiosis create? haploids or diploid? somatic cells or gametes?