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: Eric hears a sound from far away. If this is the first sound he heard, this sound is likely 
 Option1: strong 
 Option2: weak 
 Explanation: The farther the sound waves travel away from the source, the more spread out their energy becomes.

SOLUTION: strong

PROBLEM: Question: When it is very warm what happens to the speed of items? 
 Option1: speed up 
 Option2: slow down 
 Explanation: For a given medium, sound waves travel more slowly at lower temperatures.

SOLUTION: speed up

PROBLEM: Question: Joe is pulling a rubber band with his fingers. When does the band have the most elastic force? 
 Option1: at rest 
 Option2: when stretched 
 Explanation: The elastic force increases the more the material is stretched or compressed.

SOLUTION:
when stretched