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.
Q: Question: Bob takes a deep breath, so that his lungs will have less painful pressure, making the size of Bob's chest
Answer: increase
A:
Inhaling, or breathing in, increases the size of the chest, which decreases air pressure inside the lungs.