[[1]] speciation demonstrates the formation of new species due to intrinsic factors like mutations.

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answer is SYMPATRIC .

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Detailed Solution

Sympatric speciation demonstrates the formation of new species due to intrinsic factors like mutations.

Species is a group of similar individuals capable of exchanging genes or interbreeding to produce offspring. When an intrinsic factor like mutation causes the individuals inhabiting the same geographical location to evolve differently until they can no longer interbreed, new species are formed. Such a type of speciation is known as sympatric speciation.

An example of sympatric speciation is observed in two species of cichlid fish, Amphilophus species. Both the species, though found in Lake Apoyo and very similar (except for subtle differences) in their appearances, cannot interbreed.

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