instruction:
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:
Question: Ivan yells across a canyon in the morning when it is cold and again later in the afternoon when it is hot. During which time did his voice travel the slowest? 
 Option1: morning 
 Option2: afternoon 
 Explanation: For a given medium such as air, sound has a slower speed at lower temperatures.
answer:
morning


question:
Question: Tina is putting on a sweater. As she stretches out the material, its elastic force 
 Option1: increases 
 Option2: decreases 
 Explanation: The farther the material is stretched or compressed, the greater the elastic force becomes.
answer:
increases


question:
Question: When it's a cloudy day, compared to when the sun is shining down unobstructed, the heat levels are 
 Option1: higher 
 Option2: lower 
 Explanation: The more focused the Suns rays are, the more energy an area receives and the warmer it is.
answer:

lower