Answer: it is working out by doing exercises that quickly accelerate your heart rate
Explanation:
A good example is running on a treadmill or jump and jacks
Answer: A wave
Explanation: Waves move in that kind of up and down motion, a circuit is a straight line with energy flowing through it, a magnet is a pulling effect and a prism is a shape, not necessarily a motion.
Hope this helps ^_^
The answer to this is DNA.
C. Commensalism
"An association between two organisms in which one benefits and the other derives neither benefit nor harm."
Answer: Alveoli
Explanation: Alveoli of lungs are surrounded by extensive blood capillaries. The partial pressure of oxygen in the alveoli is higher than the blood entering the pulmonary capillaries, hence oxygen moves into the blood. Carbon dioxide in the lungs simultaneously diffuse out of the blood into the alveolar space.