Heavy wear on Neandertals' incisor teeth has led some scientists to conclude that Neandertals used their front teeth:
a. as a kind of third hand for gripping materials.
b. for hunting and killing small animals.
c. for shaping the cutting edges of stone blades.
d. for gouging trees to extract sap.
Ans: a. as a kind of third hand for gripping materials.
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