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.

Question: When you have air pressures change very little what happens to the wind? 
 Option1: decreases 
 Option2: increases 
 Explanation: Differences in air pressure over the surface of the Earth result in wind. The greater the differences in air pressures, the stronger the wind.
decreases

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).
thin

Question: Sean digs in the dirt and finds rocks that are buried very far down. Given how deep they were, Sean can assume that these rocks are 
 Option1: younger 
 Option2: older 
 Explanation: Lower rock layers were laid down earlier, so they are assumed to contain older fossils.

older