If you look at Cosmos episode 1, I'm sure you find an answer there.
The answer is Arteries
Arteries carry oxygen-rich blood from the heart to capillaries. On the contrary, veins carry blood without oxygen from the capillaries to the heart.
Arteries are very flexible and yet strong blood vessels so that efficient transport of oxygen-rich blood along the bloodstream through the organism is enabled.
Answer:
to break down food
Explanation:
and also to absorb nutrients
B, because they can only see shapes.
