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How is sound INTENSITY related to the SQUARE of the AMPLITUDE?

AIndependent
BDoubling amplitude doubles intensity
CInversely
DDoubling amplitude makes intensity 4×
Answer & Solution
Correct answer: D. Doubling amplitude makes intensity 4×
Intensity ∝ amplitude². If amplitude doubles, intensity becomes 4× (since 2² = 4). This is why doubling amplitude requires 4× the energy.
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