The majority of the stars in the sky can be classified as what type of stars? Red giants Main sequence O-M spectral stars

i believe most of the stars we see in the sky are main sequence stars but if it needs to be more specific the most common type of star is the red dwarf, i hope this helps :)

the answer to you question is   jet streams

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.