Pqt-gshg-fov all are welcomed for $ex​

Jsuabak sm ja snjznw anzn

Explanation:

Balh blah blah

the answer is b.) hydrogen bonds between bases.

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.