3. Heart (The heart pumps oxygen thro our entire body, continuously)
4. Blood Vessels (In humans, nutrients are carried thro blood vessels)
I hope that helps!
Answer:
I think it's white blood cells
B is the correct answer, the sun gives its energy to plants using photosynthesis, then animals eat the plants, and decompose-rs decompose anything that is dead... hope that helped, so the answer is B
-/-<span> is the best way to represent the interaction between the two species.</span>
