Final answer:
The two species mentioned are Australopithecus and Homo erectus. Australopithecus includes several ancient hominin species, and Homo erectus is known for upright walking and advanced tool use. The correct option is 1) Homo erectus and Australopithecus.
Step-by-step explanation:
The two species mentioned in the content are Australopithecus and Homo erectus. Australopithecus is a genus that includes several species such as Australopithecus afarensis, Australopithecus bahrelghazali, Australopithecus garhi, and Australopithecus africanus. These species are early hominins that evolved in Africa around four million years ago and are considered our ancient ancestors.
Homo erectus, on the other hand, emerged much later and is known for being the first hominid to walk upright and for developing more advanced stone tools than Australopithecus. Fossil evidence suggests that Homo erectus had a larger brain than Australopithecus and made significant technological and cultural advances. Therefore, the answer to the question is option 1) Homo erectus and Australopithecus.