Which of these best describes the process of budding? A. Asexual reproduction resulting in the formation of new organisms from outgrowths of mature organisms.
B. Sexual reproduction resulting in the nucleus of two cells uniting to form a new organism.
C. Asexual reproduction resulting in the formation of a spore that grows into a new organism.
D. Sexual reproduction resulting in a sex cell dividing evenly to form two identical daughter cells.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

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.