A population of frogs in a pond began with 67 individuals. Over one year, the population changed to 53.Which are two possible reasons for the change within the frog population?

The population decreased from 67 frogs to 53, a loss of 14 individuals. Emigration (frogs leaving) or an increase in the death rate could reduce the population. Immigration and an increase in birth rate would tend to increase it.

AI-written and checked against the verified answer.