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.

Ex Input:
Question: Will's spaceship flew further and further from the sun. The temperature _____ over time.
Option1: increased
Option2: dropped
Explanation: The stratosphere gets most of its heat from the Sun. Therefore, its warmer closer to the Sun.

Ex Output:
dropped

Ex Input:
Question: When you go into a cave, the rocks at shallower levels are _____ than the rocks on the surface.
Option1: younger
Option2: older
Explanation: The main law is the law of superposition. This law states that deeper rock layers are older than layers closer to the surface.

Ex Output:
younger

Ex Input:
Question: Paul started at the base of a mountain and climbed to its peak. The sky was clear and the sun was beating down on him all day. However, he noticed there was a clear temperature difference between the surface's temperature and the temperature at the top of the mountain peak. Where would he feel more heat?
Option1: Surface
Option2: Mountain Peak
Explanation: The surface is heated by the Sun and some of that heat radiates back into the air. This makes the temperature higher near the surface than at higher altitudes.

Ex Output:
Surface