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.
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Question: Question: As Cindy swam closer to the ocean surface, it got lighter and _____. 
 Option1: warmer 
 Option2: cooler 
 Explanation: Water density increases as salinity and pressure increase, or as temperature decreases.

Answer: warmer


Question: 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).

Answer: thin


Question: Question: Milo is swimming in the pool at the shallow end. Suddenly he decides to move to the deep end. What happens to the water as he swims deeper? 
 Option1: gets warmer 
 Option2: gets colder 
 Explanation: Water also gets colder as you go deeper.

Answer:
gets colder