Answer:
D
Explanation:
Because they are all behaviors you choose to do everyday in your life
Jump up into the air as high as you can. Land softly and immediately lower into the next rep.
Do as many reps as possible in 45 seconds.
Answer:
B Heart and lungs
Explanation:
The thoracic cavity is another term for the chest cavity. It is enclosed by the ribs, spine, and breast bone, and is separated from the abdomen by the diaphragm.
It contains the heart, lungs, and the esophagus, and the blood vessels that supply them.