Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Question: Mark studies rocks for a living. He is curious if rocks deeper in the Earth will be warmer or cooler. If Mark were to take the temperature of a rock that is half a mile into the Earth's surface, and then take the temperature of a rock 1 mile into the Earth's surface, he would find that the rock 1 mile into the Earth's temperature is
Option1: lower.
Option2: higher
Explanation: Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths.
Student:
higher