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: When humans grow trees what happens to the population of the animals in the forest 
 Answer: Increase
[EX A]: The forest habitat of elephants has also decreased in size due to humans moving in, so the numbers of the elephants have decreased.

[EX Q]: Question: Jim puts his water in the oven for later. The molecules in the liquid 
 Answer: speed up
[EX A]: When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.

[EX Q]: Question: Dana goes with her mother to get screened for breast cancer. The person who is less likely to have it has an age that is 
 Answer: lower
[EX A]:
Breast cancer is rare in teens. It becomes more common as women get older.