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.

Question: James stares at the volcano and saw the rocks melt because of the _____ temperatures. 
 Option1: high 
 Option2: low 
 Explanation: Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths.
high

Question: Chris is studying two countries. He finds that China has half as many factories putting out fossil fuels into the air than the United States. Based on this information, the factories in _____ are causing more air pollution. 
 Option1: United States 
 Option2: China 
 Explanation: Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do.
United States

Question: When objects move apart, their magnetic attraction will 
 Option1: increase 
 Option2: decrease 
 Explanation: The smaller the distance between the objects, the greater the force of magnetic attraction.

decrease