The term that would best define the fish added to the pond is introduced species.
<h3>What is introduction of a species?</h3>
Adaptation to the conditions of the place in which it was inserted, the absence of predators and degradation are the main factors that lead an exotic species to become invasive, competing with native species for resources and causing a great impact on the community.
In this case, the introduced species are exotic species which has arrived there by human activity, may even be harmful to the entire ecosystem because they can break the delicate equilibrium of the ecosystem.
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A because when the little fish die they sink to the bottom, and after time the skeletons build up on top of each other.
It’s B why do I have to write 20 characters
The correct answer is Lysosomes
Lysosomes are used for digestion of materials in the cell.
Phagocytosis and the inflammatory response. Macrophages are a cornerstone of the innate immune system. ... Recent work indicates that Toll-like receptors play a key role in reading a "bar code" on invading microorganisms and in eliciting a specific immune respone.