Populations of organisms, such as kudzu and the fire ant, that are introduced into a new habitat and reproduce very rapidly are known as species.

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.

answercalled plucking;

label a:   the core

label b : the chromosphere

label c : the photosphere

label d: the corona