What do you think the organism is

Kinda confused by the question but if you're asking what an organism is than..

Explanation:

it is "an individual animal, plant, or single-celled life form." -Google Definition

Can you elaborate on the question you have provided here

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.