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.
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Question: Question: Increasing the mass of an object causes its inertia to 
 Option1: increase 
 Option2: decrease 
 Explanation: The full box is harder to move because it has greater mass and therefore greater inertia.

Answer: increase


Question: 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.

Answer: the slow motion


Question: Question: Mike is digging for old rocks. Mike dig downs very, very shallow, and he expects the rocks there to be 
 Option1: older 
 Option2: younger 
 Explanation: Therefore, deeper rock layers must be older than layers closer to the surface.

Answer:
younger