The pelvis bone functions as an attachment point for legs. So, the pelvis bone found in dolphins is organ. Information about this organ tells us that​

b would be the right answer

every el niño cycle is different. every year.

b - the respond is innate and varies over time.

good luck!

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.