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: John was weighing some materials in his science lab. He observed that as objects had greater density, the heaviness of the objects 
 Option1: Increased 
 Option2: Decreased 
 Explanation: A given volume of a denser substance is heavier than the same volume of a less dense substance.
[EX A]: Increased

[EX Q]: Question: Going higher in the mesosphere, we encounter _____ temperatures. 
 Option1: higher 
 Option2: lower 
 Explanation: In the mesosphere, temperature decreases as altitude increases.
[EX A]: lower

[EX Q]: Question: If Mona is adding chemicals to her swimming pool before the start of the summer and she raises the pH number of the water, what happens to the acidity of the swimming pool? 
 Option1: increases 
 Option2: decreases 
 Explanation: Lower pH numbers are more acidic and higher numbers are less acidic (also called more alkaline).
[EX A]:
decreases