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: If Milo notices that the frequency of his electromagnetic wave seems to be decreasing, what does that say about the energy of the wave? 
 Option1: it's increasing 
 Option2: it's decreasing 
 Explanation: The higher the frequency of an electromagnetic wave, the greater its energy.
answer:
it's decreasing


question:
Question: Harry is 6 feet away from you and Sara is 15 feet away. Who will appear to move further away if they both take one step? 
 Option1: Harry 
 Option2: Sara 
 Explanation: The closer your finger is to your eyes, the greater the position changes because of parallax.
answer:
Harry


question:
Question: Eric rubs together tissue paper and then sandpaper. The rougher tissue paper has _____ friction than the sandpaper. 
 Option1: less 
 Option2: more 
 Explanation: Rougher surfaces have more friction between them than smoother surfaces.
answer:

more