AAAS Science Assessment ^beta

Which of the following statements is TRUE about increases in the size of populations of robins?

1. The size of populations of robins can increase to be infinitely large.
2. The size of populations of robins always increases at about the same rate.
3. The size of populations of robins always stays about the same because the number of deaths is always about the same as the number of new robins hatched.
4. The size of populations of robins can increase when there is an increase in the food available and a decrease in the number of predators.