Answer:
As blood travels through the body, oxygen is used up, and the blood becomes oxygen poor. Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart.
Explanation:
D) Chlorine, Cl. Hope that helped
The answer is 18 you multiply wavelength (6) times frequency (3)
