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.

[EX Q]: Question: If Mona is building an electrical device and she decreases the total resistance of it, what happens to the current strength? 
 Answer: increases
[EX A]: As the total resistance increases, the current strength decreases.

[EX Q]: Question: Tasha is studying birth rates in various countries. She looks at two countries. In South Africa, the food supply is currently higher than in Australia. Because of this, the birth rate in South Africa, compared to Australia, will be 
 Answer: higher
[EX A]: Low food supply or a lack of space can lower birth rates, increase death rates, or lead to emigration.

[EX Q]: Question: If Mona lives in a city that begins producing a smaller amount of pollutants, what happens to the air quality in that city? 
 Answer: increases
[EX A]:
More pollutants mean poorer air quality.