Answer:
cell membrane is the answer
The answer is D.) the process where distribution of molecules is balanced out by their movement.
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.
B. Clay particles are the smallest