Answer:
The circulatory system
Explanation:
The heart, veins and arteries works together to service the cells of the body
Answer. They are the “last trophic level” in some hierarchies because they feed on everything (National Geographic). However, according to the strict trophic level definition they would be primary consumers.
D1, A2, B3, C4, and sicnce 5 and E are left i guess they mach up, but it dont think that water is a wast.. but the other one r right
Biology is the study of life.
