Question

During exhalation, the space in the chest cavity
(a) increases
(b) remains the same
(c) decreases
(d) none of these​

Answer 1

Answer:

c) decreases

Explanation:

When you breathe out, or exhale, your diaphragm and rib muscles relax, reducing the space in the chest cavity. As the chest cavity gets smaller, your lungs deflate, similar to releasing of air from a balloon.