TASK DEFINITION: You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.
PROBLEM: Question: When you are mixing paints if you add less water the colors will be 
 Option1: darker 
 Option2: lighter 
 Explanation: If the kidneys remove less water from the blood, the blood will look darker, because there is less water in it.

SOLUTION: darker

PROBLEM: Question: Milo lives in a small city, but the city has recently become more popular with young people. If more young people begin leaving the city, what happens to the growth rate of the city? 
 Option1: increases 
 Option2: decreases 
 Explanation: In exponential growth as the population size increases, the growth rate also increases.

SOLUTION: decreases

PROBLEM: Question: Milo's risk of developing cardiovascular disease are lesser when he is 
 Option1: older 
 Option2: younger 
 Explanation: Older age, male gender, and a family history of cardiovascular disease all increase the risk of developing cardiovascular diseases and cant be controlled.

SOLUTION:
younger