instruction:
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:
Question: John was weighing some materials in his science lab. He observed that as objects had lower 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.
answer:
Decreased


question:
Question: If you found something with very few hydrogen ions it would be 
 Option1: basic 
 Option2: acidic 
 Explanation: With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.
answer:
basic


question:
Question: If Mona is adding chemicals to her swimming pool and she lowers the pH value of the water, what happens to the acidity of the water in the pool? 
 Option1: increase 
 Option2: decrease 
 Explanation: The lower the pH value is, the greater is the concentration of hydrogen ions and the stronger the acid.
answer:

decrease