TASK DEFINITION: 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.
PROBLEM: 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.

SOLUTION: Harry

PROBLEM: Question: Sandra sees a tiny glacier, and notes that it has smaller tributary glaciers flowing into it, in valleys that are 
 Option1: shallow 
 Option2: deep 
 Explanation: Smaller tributary glaciers, like tributary streams, flow into the main glacier in their own shallower U-shaped valleys.

SOLUTION: deep

PROBLEM: Question: If Jim increases the number of segments on a rope he is using as a pully, the amount of force that he needs to apply when lifting something with the rope 
 Option1: increases 
 Option2: decreases 
 Explanation: The more rope segments on a pully that are helping to do the lifting work, the less force that is needed for the job.

SOLUTION:
decreases

