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: Smaller dogs have a slower growth rate than big dogs so that means they get: 
 Option1: Smaller 
 Option2: Larger 
 Explanation: In exponential growth as the population size increases, the growth rate also increases.

SOLUTION: Smaller

PROBLEM: Question: Yolanda moved to Denver where it is 5000 feet above sea level. The atmosphere here is considered 
 Option1: dense 
 Option2: thin 
 Explanation: The density of the atmosphere decreases with an increase in the height above sea level (altitude).

SOLUTION: thin

PROBLEM: Question: Mike wants to get the most hydrogen ions that he can out of his acid, so he will get an acid that is 
 Option1: weaker 
 Option2: stronger 
 Explanation: A stronger acid produces more hydrogen ions than a weaker acid.

SOLUTION:
stronger