Final answer:
Homo erectus was similar to modern humans in bipedal locomotion, advanced tool use, and had a larger cranial capacity relative to earlier hominins. They also displayed complex social behaviors reminiscent of modern humans.
Step-by-step explanation:
The question 'How is Homo erectus like modern humans?' can be answered by option (d) All of the above. Like modern humans, Homo erectus exhibited bipedal locomotion, which is reflected in skeletal traits such as a broader pelvis, longer legs, and arched feet that are similar to those of modern humans. They also exhibited advanced tool use, creating and using stone tools, with evidence suggesting their tools were more sophisticated than those of their predecessors. Regarding cranial capacity, although Homo erectus had a smaller brain relative to modern humans, it was larger than earlier hominins, marking a key step towards modern human brain size. In addition, they utilized fire, built shelters, and their social behavior, including caring for the sick and elderly, draws parallels with modern human societies.