HURRY PLZ 40 POINTS Which statement best explains why blood is “waste-rich” when it returns to the heart?
The blood has a high concentration of oxygen and a low concentration of carbon dioxide.
The blood has a high concentration of oxygen and a low concentration of hemoglobin.
The blood has a high concentration of carbon dioxide and a low concentration of oxygen.
The blood had a high concentration of hemoglobin and a low concentration of oxygen

Occurs when the immune system attacks the body. lupus cancer sickle cell disease huntingtons disease

40 points and think about the following questions and then write several paragraphs in response: when did the fight occur, and what was it about? who was at fault—you, the other person, or both of you? why do you think it ended poorly? in general, what would you have done differently? what could you have said differently that would have let the other person know you were listening? if you could take back something you said during the fight, what would it be? what do you wish you would have said during that fight? did the fight result in your not being friends or not getting along with that person anymore? would you want repair your relationship with this person again? if so, what are some possible ways to fix the damage?

Answer the questions in the image for brainliest. are my answers right? ?