Answer: Haiya! Explanation: I am sorry if this is wrong forgive me if it is wrong. I am not going to lie cause I ain’t a liar but I looked at the person above me for the answer..... I am sorry!
Because it is flexible. Think about it; the ribs protect both the lungs and the heart. If the ribs were solid bone all the way around then unless you constantly break your ribs you wouldn't be able to expand the cheat to breath. Additionally your lungs would constrict the heart to a degree that it would function properly.
From my understanding i would say true
