The reason as to why there is essentially no waste in the natural world is because; in the natural world, there is essentially no waste since the waste of one organism becomes the nutrients or raw materials for other organisms. Solid wastes are unwanted or discarded material we produce that is not liquid or gas. Mother nature also has her own waste disposal solutions in place for years. In natures one organism's waste is another's feast. Natures clean up crew includes the decomposers, scavengers and the detritivores and also the process of biodegradation.
The earthworm has a closed circulatory system, and there are 3 main vessels: <span>aortic arches, dorsal blood vessels, and ventral blood vessels.
aortic arches: It functions as the heart of the earthworm
dorsal blood vessels: Responsible to carry blood to the front of the body
ventral blood vessels: Responsible to carry blood to the back of the body
hope this helps</span>
30.6 • 150 is the same as 4,500 + 90, or 4,590 million kilometers, oddly enough, this isn't one of the options for an answer. Perhaps there was a typo?
D would be the correct answer
