Answer: The things that are listed .
Explanation: The circulatory system is made up of blood vessels that carry blood away from and towards the heart : Arteries carry blood away from the heart and veins carry blood back to the heart .
I’m guessing the answer is 4
All of those ARE reasons why communicable diseases kill fewer people today except for B. Your answer is B.
The answer would be true I hope this helps!!!!!!!
