Susan makes a claim that humans do not evolve because we adapt to situations by changing our technology, not ourselves. Which piece of evidence contradicts this idea?

Evidence that humans have changed biologically would contradict the claim that we adapt only by changing technology. The increase in brain size since humans began using tools shows a physical change in humans over time, which is evolution. Therefore, the correct choice is A, “The size of our brains has increased since humans started using tools.”

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