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The production of a new species by the splitting of an existing one is known as:

  1. Mimicry

  2. Natural selection

  3. Sympatric speciation

  4. Allopatric speciation

The correct answer is: Allopatric speciation

Allopatric speciation is the correct answer because it involves the splitting of an existing species. Mimicry is when a species adapts to look like another species. Natural selection is the process by which certain traits are selected for survival. Sympatric speciation is when a new species forms within the overlapping range of an existing species, and is not related to the splitting of an existing species. Therefore, allopatric speciation is the most accurate and specific answer to the question.