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: Less oxygen absorption means _____ oxygen in the blood. 
 Answer: less
Example Output: Smoking reduces the amount of oxygen available for diffusion at the lungs, so less oxygen gets absorbed and blood is oxygenated to a lesser degree.

Example Input: Question: If Mona is breathing hard and her volume increases, what happens to the air pressure inside her lungs? 
 Answer: decreases
Example Output:
During inhalation, because the chest volume is larger, the air pressure inside the lungs is lower than the air pressure outside.