Your answer would be absorption
In a red blood cell, the control center is the nucleus. A mitochondria is not a nucleus. It is another organelle that produces energy for the cell.
Answer:
Excretion helps maintain Homeostasis by excreting wastes from the body, which eliminates harmful toxins housing themselves in your body, which would increase the chance of getting an illness. ... When you exhale, carbon dioxide and some water are removed from the body by the lungs.
I'd say you're correct, it is D.
The caterpillar would eat leaves off the tree, leaves that are necessary for keeping the tree oxygenated.
