The species though insignificant in number determines the existence of many other species in a given ecosystem
A
Extinct species
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B
Endemic species
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C
keystone species
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D
Sacred secies
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Solution
The correct option is C keystone species
A keystone species is a plant or animal that plays a unique and crucial role in the way an ecosystem function. Without keystone species, the ecosystem would be dramatically different or cease to exist altogether. Some keystone species, such as the wolf, are also apex predators. Keystone species have a disproportionately large effect on the communities in which it occurs. Such species help to maintain local biodiversity within a community either by controlling populations of other species that would otherwise dominate the community or by providing critical resources for a wide range of species.