Two species of three-spined stickleback fish live in a single lake in British Columbia.They are closely related but occupy different niches.They exist nowhere else.These species most likely arose by sympatric speciation from a single species of three-spined stickleback.

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Sympatric speciation occurs when a new species arises from a single ancestral species while still living in the same geographic location. In this case, the two species of three-spined stickleback fish occupying different niches within the same lake likely arose by sympatric speciation from a single ancestral species. Therefore, the statement is true.

Two Species of Three-Spined Stickleback Fish Live in a Single