Ateam of scientists is researching the relationship between the two subspecies of a. africanus and concludes that the subspecies were actually different species. which of the following would increase the reliability of this conclusion?

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.