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.

Example Input: Question: Dana washes her hands a lot, so her bacteria has mutated to help to resist antibiotics. As that bacteria decreases in numbers, the mutation becomes 
 Answer: rare
Example Output: Bacteria with a mutation the helps resist antibiotics increase in numbers, so the mutation becomes more common.

Example Input: 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
Example Output: The closer the field lines are drawn together, the stronger the field being described.

Example Input: Question: A halving of carbon atoms in a hydrocarbon will cause _____ isomers. 
 Answer: less
Example Output:
As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.