B energy and nutrients cycle through an ecosystem
Answer:
A Biotic factors are the living parts of an ecosystem.
The abiotic factors in an ecosystem include all the nonliving elements of the ecosystem.
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Heart and lungs works hand in hand. Not only that they are close to each other but they also work to make sure that body gets enough oxygen that it needs to live. It is the heart that pumps blood through the body it passes through the lungs. then it is the job of the lungs to supply oxygen together with the blood that heart pumps.
