Answer :
He proposed natural selection as the mechanism of evolution ,this statement is correct about Darwin's contributions.
According to Darwin's theory, only the higher adaptations are self-selected and the lower ones eliminated. Therefore, not all changes lead to continuous evolution. For example, people living in tropical countries have more melanin in their bodies to protect them from sunlight. According to Darwin, all living things had a common ancestor at some point in time and have remained unchanged ever since. His theory of evolution supports the theory of change and different theories of evolution.
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