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: Given two equal measures of water by volume, which would be lighter 
 Option1: ocean water 
 Option2: distilled water? 
 Explanation: Water becomes more dense when it is colder and when it has more salt.

SOLUTION: distilled water?

PROBLEM: Question: As the rocket falls down through the troposphere and gets nearer to the Earth's surface, the air will be 
 Option1: warmer 
 Option2: cooler 
 Explanation: Air in the troposphere is warmer closer to Earths surface.

SOLUTION: warmer

PROBLEM: Question: Because of gluons, quarks are attracted each _____ strongly the closer they are. 
 Option1: more 
 Option2: less 
 Explanation: Gluons make quarks attract each other more strongly the farther apart the quarks get.

SOLUTION:
less