Final answer:
Dr. Gonzalez's favorite hominin species is Australopithecus, an extinct genus of bipedal hominins.
Step-by-step explanation:
Dr. Gonzalez's favorite hominin species of all time is Australopithecus. Australopithecus is an extinct genus of hominins that lived around 4 to 2 million years ago. They were bipedal and walked upright with human-like feet, arches, and ankles. They had small jaws and teeth, a skull shaped like H. erectus or H. habilis, and a sagittal keel on top of their skull.