How has organizational system evolved or changed over time and why were the changes made​

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

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?