Make the causal links visible - Paper 2

Read before answering

Supplied process facts for a volume control model: the system reduces the amplitude of the output signal; the speaker produces a quieter sound in this simplified model. Instruction: 'Turn the volume down.' Use only this model, without claiming it covers every real system. An explanation links cause and consequence; an instruction asks someone to act. This is a writing exercise, not a request to build electrical or other equipment.