Lumber lordosis or the inward 's-shapes' curve of the human spine, can be described as a ___ trait: or a trait that the human species have, but is not present in older species such as the last common ancestor that the lineage of human species shared with the last common ancestor to chimpanzees.  a. Obtained  b. Derived  c. Evolved

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Human Evolution

Human evolution is the process of evolution of humans from early man to anatomically modern humans. The process of evolution in humans leads to the gradual development of traits like bipedalism. Humans are the highly social animals that make them the most advanced animal on Earth.  Human evolution is an outcome of interaction among the following processes: