Answer:
The components that was having the second largest effect on population growth was deaths.
Explanation:
In this question:
The largest the frequency(less time between each time, larger frequency), the higher effect of the component in population growth.
In this question:
Due to the rates, the effects on population growth, in descending order ir:
Birth - Deaths - Gain of one person - Migrants
So the components that was having the second largest effect on population growth was deaths.