In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Example Input: Question: If Jim climbs to the top of a mountain and takes the temperature after taking the temperature at the bottom of the mountain, which area will he get a lower reading at? 
 Answer: top of the mountain
Example Output: The surface is heated by the Sun and some of that heat radiates back into the air. This makes the temperature higher near the surface than at higher altitudes.

Example Input: Question: Will has a pully with 5 rope segments. Alan's pully has an equal size rope with 7 segments. Which person needs less force to do the same job? 
 Answer: Alan
Example Output: The more rope segments on a pully that are helping to do the lifting work, the less force that is needed for the job.

Example Input: Question: If Mona is comparing a football and a baseball and she determines that the football is rougher then the baseball, which item has more friction? 
 Answer: football
Example Output:
Friction is greater when objects have rougher surfaces or are heavier so they press together with greater force.