Respuesta :
The correct answer is:
a.increasing birth rate with a greater number of young organisms
Explanation:
When an area undergoing improvement in the population growth of the organisms that are living in it is ordinarily a result of a combination of many favorable factors. These circumstances commonly substitute for increasing birth rate, that is, the number of offspring that are been reproduce will increase significantly. This, in turn, will lead to an increase in the number of young living organisms in the population and ultimately in the number of young individuals that are rational of breeding, fortunately.