What is the primary type of biological anthropology scenario b biological anthropologists have observed several chimpanzees in western africa making tools to them hunt. the chimpanzees were seen modifying branches and sticks into spears. they removed any leaves or small branches to make a smooth shaft. they also chewed on the end of the branches to give them sharp points. they then thrust the sharpened branches like spears into tree trunks, where small primates called galagos make sleeping nests. although it remains unclear how successful the chimpanzees are in actually killing galagos, multiple members of the chimpanzee group have been observed producing the spears. in this research?