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.

[EX Q]: Question: Yolanda moved to Florida where it is at 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).
[EX A]: dense

[EX Q]: Question: A chemist compared two substances in the lab. Which substance will have a higher concentration of hydrogen ions? 
 Option1: the substance with the higher pH 
 Option2: the substance with the lower pH 
 Explanation: The lower the pH value is, the greater is the concentration of hydrogen ions and the stronger the acid.
[EX A]: the substance with the lower pH

[EX Q]: Question: Compared to a block of ice , would the water molecules in a kettle of boiling water move 
 Option1: faster? 
 Option2: slower 
 Explanation: The more energy the particles in matter have, the faster and more strongly they vibrate.
[EX A]:
faster?