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: 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: Jimbo was playing with magnetic field lines by manipulating them. If he moves the field lines less close, what happens to the strength of the field? 
 Answer: decreases
[EX A]: The closer the field lines are drawn together, the stronger the field being described.

[EX Q]: Question: Micah wants to be able to read very small text, and needs to use a tool to do so. He looks at two magnifying glasses, and chooses the one with the lens that is 
 Answer: more curved
[EX A]:
The more curved the convex lens is in a magnifying glass, the greater its ability to magnify objects.