15 [points 3. according to the video, why is our society able to specialize? our government requires it we trade with other nations a superior education system

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

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.