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: Mike wants his voice to travel slowly, so he will speak in a room that is 
 Option1: colder 
 Option2: warmer 
 Explanation: For a given medium such as air, sound has a slower speed at lower temperatures.

SOLUTION: colder

PROBLEM: Question: Living things with great traits should produce _____ offspring than living things with better traits. 
 Option1: more 
 Option2: less 
 Explanation: Natural selection is the process by which living things with beneficial traits produce more offspring, so their traits become more common over time.

SOLUTION: more

PROBLEM: Question: Mike is stretching a rubber band out. The harder he pulls, and the more he stretches it, the resistance of the band is 
 Option1: greater 
 Option2: lesser 
 Explanation: The farther you stretch the band, the greater the resistance is.

SOLUTION:
greater