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.

[EX Q]: Question: If Jupiter has a bigger orbit then Mercury, which planet will take a shorter time to revolve around the Sun? 
 Answer: Mercury
[EX A]: The planets further from the Sun will have bigger orbits, and therefore take longer to revolve around the Sun.

[EX Q]: Question: Jeff noticed the food supply changed over time in his city. The advent of farming machines likely caused the food supply to 
 Answer: increase
[EX A]: Better farming techniques and machines increased the food supply and the distribution of food.

[EX Q]: Question: James was going mountain climbing and decided to perform an experiment. He took the temperature at the base of the mountain, then took the temperature at the top of the mountain. Which area registered a lower temperature? 
 Answer: top of the mountain
[EX A]:
Glaciers often form in the mountains because higher altitudes are colder and more likely to have snow that falls and collects.