Final answer:
Homo sapiens do not have a pronounced brow ridge, which differentiates them from archaic Homo species such as Homo erectus.
Step-by-step explanation:
Anatomical traits that Homo sapiens do not have include a pronounced brow ridge, prominent supraorbital ridges, and a thick skull. Homo sapiens evolved from Homo erectus and other archaic Homo species which had more pronounced physical features such as a thicker skull and more prominent brow ridges. In contrast, Homo sapiens have a more rounded skull with a steep forehead, a distinctive chin, and a reduced brow ridge. Modern humans or Homo sapiens also are characterized by an arched foot which supports bipedalism, larger cranial capacity averaging about 1,400 cubic centimeters, and a prominent forehead. Thus, the correct anatomical trait that Homo sapiens do not have from the choices given is a pronounced brow ridge (option a).