Explanation

Option B is correct: Denisovans are an extinct species or subspecies of archaic humans in the genus *Homo*:

– First identified from bone and dental fragments discovered in Denisova Cave in the Altai Mountains of Siberia, Russia.
– Genetic research confirms they shared a common ancestor with Neanderthals and interbred with ancient anatomically modern humans (*Homo sapiens*), leaving genetic signatures in present-day populations in Melanesia, Indigenous Australians, and parts of Southeast Asia.

Therefore, it refers to an early human species — Option B.