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: When Dean went to the top of the mountain and reached the peak, he noticed that the top of the mountain, compared to the bottom, had snow in amounts that were 
 Answer: larger
Example Output: Glaciers often form in the mountains because higher altitudes are colder and more likely to have snow that falls and collects.

Example Input: Question: When there are fewer people in an area the amount of water will 
 Answer: increase
Example Output: The availability of water is projected to get worse as demand increases.

Example Input: Question: Boris was tasked with developing a hypersonic rocket. He built two prototypes that were identical except that they have different gas velocities out of the nozzle. Which rocket was likely the slowest? 
 Answer: the rocket with lowest gas velocity
Example Output:
The rocket goes upwards because the hot gases shoot downwards out of the nozzle. The faster the gases go downwards, the faster the rocket goes upwards.