How did Homo Habilis and Australopithecus Africanus differ?

[StarsHearts]

and why did Australopithecus become extinct while while H. Habilas continued to evolve.

[AndyF]

Early Homo compared to Australopithecus is characterized by greater encephalization, altered cranial shape , smaller molars and narrower teeth, especially pre molars.

I do not believe that A. africanus became extinct for the reasons we usually think of such as over harvesting or loss of habitat. I think they eventually became H.habilis as the result of evolution, which is a long term result of adaptation to change.