Quantum mechanics is a fundamental theory in physics that describes the physical properties of nature at the scale of atoms and subatomic particles. In this context, can you please provide a brief explanation of the concept of superposition in quantum mechanics? Your response should contain at least 3 sentences. Highlight at least 2 sections in your answer with markdown, i.e., *highlighted section*. In your response, the word *quantum* should appear at least 3 times.

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