What was the major hominin group that lived from about 4 to 1 m.y.a.?

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The major hominin group that lived from about 4 to 1 million years ago was Australopithecus. This group includes several species, such as Australopithecus afarensis (which includes the famous fossil "Lucy"), Australopithecus africanus, and Australopithecus sediba. These hominins are known for adaptations such as bipedalism and relatively small brain size compared to later hominins like Homo erectus and Homo sapiens.

What Was the Major Hominin Group That Lived from About