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: Allen is riding his bike on a path. The course ends up 1000 feet lower above sea level compared to the beginning. At which point is the air resistance lower? 
 Answer: at the beginning
Example Output: At higher elevations, there is less air to press on a given area.

Example Input: Question: Carla is pushing two carts down a street. One cart is heavy, the other is light. The light cart, compared to the heavy one, will accelerate 
 Answer: quickly
Example Output: The greater the mass of an object, the less it will accelerate when a given force is applied.

Example Input: Question: When people get older they get 
 Answer: sicker
Example Output:
Many diseases become more common as people grow older.