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 we are trying to move through the thermosphere the lower we go the _____ it will feel 
 Option1: colder 
 Option2: warmer 
 Explanation: In the thermosphere, temperatures increase as altitude increases.

SOLUTION: colder

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: If Jim delves deep into the Earth and takes a sample then compares it to a sample he took close to the surface, which sample will be newer? 
 Option1: deep sample 
 Option2: shallow sample 
 Explanation: Older layers are deeper in the Earth, younger layers are closer to the surface.

SOLUTION:
shallow sample