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.
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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: If Milo increases the heat he applies to a resistor, what happens to the resistance? 
 Option1: increases 
 Option2: decreases 
 Explanation: The hotter a resistor becomes the more resistance it has.

Answer: increases


Question: Question: When we dig up rocks the deeper we get the rocks get 
 Option1: older 
 Option2: younger 
 Explanation: Older rocks are at the bottom and younger rocks are at the top.

Answer:
older