What is a possible genetic mutation for polar bears that could benefit them when the temperatures continue to rise in the Arctic? pls talk about genes, DNA, and chromosomes in your answer.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves