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: If the people in Mary's country start to create less greenhouse gases, what will happen to the possibility that changes may occur? 
 Option1: increase 
 Option2: decrease 
 Explanation: As greenhouse gases increase, changes will be more extreme.

SOLUTION: decrease

PROBLEM: Question: In a science class, the professor demonstrates refraction to the class. First, the professor shows a curved lens from a binocular, and then a flat pane of glass, demonstrating that 
 Option1: the curved lens refracts less light 
 Option2: the flat pane refracts less light. 
 Explanation: The more curved the surface of a lens is, the more it refracts the light that passes through it.

SOLUTION: the flat pane refracts less light.

PROBLEM: Question: Joan is examining an electron 100nm from the nucleus and an electron 50nm from the nucleus. Which has more energy? 
 Option1: the 50nm electron 
 Option2: the 100nm electron 
 Explanation: Electrons at higher energy levels, which are farther from the nucleus, have more energy.

SOLUTION:
the 100nm electron