What provides evidence of an increase in animal species at the same time that atmospheric oxygen concentrations increased? A. rust deposits
B. anaerobic organisms
C. fossil record
D. stromatolites

sorry, but you do not have posted the diagram.

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.