i think the answer is i dont know
Answer:
oxygen gas
red blood cells
platelets
Explanation:
» <u>Concepts</u>
Your blood is composed of four main things: <u>red blood cells</u> (that transport <u>oxygen</u>), <u>white blood cells</u>, <u>platelets</u>, and <u>plasma</u>. Red blood cells transports oxygen and takes out CO2, white blood cells fight bacteria and viruses, and platelets clot together to stop bleeding.
<u>Bile</u> is a fluid that is produced by the liver and stored in the gallbladder, so it's not a main component of blood.
Hopes this helps:
Answer:
They can help the survival or reproduction of relatives who carry copies of the same genes.
I Believe 3, Is Correct...If That Helps Any