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: Ron was playing with a flashlight. He moved it back and forth slowly, and then quickly. Which motion likely caused less light to bend? 
 Option1: the slow motion 
 Option2: the quick motion 
 Explanation: In refraction of light, the greater the change in speed, the more light bends.

SOLUTION: the slow motion

PROBLEM: Question: If Jim moves his telescope from a mountaintop to Death Valley, a location with much air above it, what will happen to the amount of interference from the atmosphere? 
 Option1: increase 
 Option2: decrease 
 Explanation: Many observatories are built on high mountains. There is less air above the telescope, so there is less interference from the atmosphere.

SOLUTION: increase

PROBLEM: Question: Will takes away half of a rock. The total surface area of the rock has now 
 Option1: decreased 
 Option2: increased 
 Explanation: As rock breaks into smaller pieces, the surface area of the pieces increases.

SOLUTION:
decreased