There are long mountain belts that divide the sea floor and generate new sea floor as magma rises and erupts onto Earth’s surface. What are these mountain belts known as?

the median of the data is 4.5.

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.

50% lit on the left side

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.