Final answer:
Controlled experiments provide evidence for scientific claims through manipulation of variables and careful control to determine causation.
Explanation:
Controlled experiments serve as evidence for a scientific claim. In a controlled experiment, variables are carefully manipulated and controlled to test a hypothesis, ensuring that any observed effect is due to the factor being studied.
For example, in a study testing the effectiveness of a new drug, participants are randomly assigned either the drug or a placebo, with all other factors kept constant, to determine the drug's true impact.
Through controlled experiments, scientists can establish causation and draw reliable conclusions based on empirical evidence.
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