The answer is mutualism.
Mutualism is a relationship between two different species in which both species benefit. In clownfish - sea anemone relationship, the clownfish is protected from predators by the sea anemone, so the clownfish benefits from this relationship. The sea anemone gets more prey thanks to a coloration of the clownfish, so the <span>sea anemone also benefits from this relationship. Since both species benefit, their relationship is an example of mutualism.</span>
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<span>... many people have little regard for their effect on the environment and will do whatever they can to make money. If there are fewer fish available in coastal waters, they'll go wherever they can find fish.</span>
The efficiency is equal to the output work of the machine / actual work the machine done * 100%. So the actual work is 50,000/80%=62,500 jewels.