In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[Q]: Question: Mona lives in a country with a lot of food available. If a natural disaster strikes and the food supply is cut off, what will happen to the birth rate in her country? 
 Answer: decrease
[A]: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.


[Q]: Question: When there are low levels of gluons in quarks it becomes 
 Answer: weaker
[A]: Gluons make quarks attract each other more strongly the farther apart the quarks get.


[Q]: Question: John is from the US. When he visited a third world country, he noticed the use of energy resources there was 
 Answer: less.
[A]:
Richer nations use far more energy resources, especially fossil fuels, than poorer nations do.