Free points!
optional question: What dinosaur is this?

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

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?