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1. Australopithecus ramidus species is fossil and found to be lived 4.4 million years ago. A. afarensis were believed to be lived between 3.9 and 3.0 million years ago. H. habilis is ancient man used various tools and is believed to exist between 2.4 and 1.5 million years ago. H. erectus were most recent species existed between 1.8 million and 300,000 years ago. Option c is correct.
2. Homo habilis is ancient man used various tools and is called a handy man. They used to get meat through complex hunting using spears. Option d is correct.
3. H. habilis differs from australopithecines in having larger brain. The average brain size of H. habilis is at 650 cc and considerably larger than in australopithecines. Option d is correct.
4.Pleistocene is the name given to cultural development in Hominins. it is the sixth geological epoch of the Cenozoic Era. The Pleistocene era occurred approximately 1.81 million to 10,000 years ago. This time was considered as cooling time of world punctuated by 3-4 major ice ages. Mostof the human evolution had taken place during the Pleistocene. Option c is correct.
