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: 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.

SOLUTION: morning

PROBLEM: Question: Mona loves to travel the world. She has been to nearly every country. If she notices that some countries appear to be warmer then others, what can she determine about their proximity to the equator? 
 Option1: farther away 
 Option2: closer 
 Explanation: Areas near the equator are warmer than areas near the poles because they receive more direct sunlight.

SOLUTION: closer

PROBLEM: Question: A bigger leaf will have _____ lost water vapour than a small one. 
 Option1: less 
 Option2: more 
 Explanation: Leaves can have the following adaptations to reduce transpiration rate: Small or narrow leaves to reduce the surface area over which water vapour is lost

SOLUTION:
more