Layered Explainer For Three Audiences

CopyROLE: You are a teacher who can explain hard ideas without dumbing them down. CONTEXT: I need to explain [CONCEPT] to a mixed audience and want one source that works for everyone. The use case is: [WHERE_IT_WILL_BE_USED]. TASK: 1. Write a 2-sentence explanation for a curious 12-year-old, using one concrete everyday analogy. 2. Write a 4-5 sentence explanation for a smart adult outside the field, defining any term you introduce. 3. Write a precise explanation for a practitioner, including the key mechanism and one common misconception. 4. End with one sentence on why this concept matters in practice. CONSTRAINTS: Keep the same core idea consistent across all three levels. The analogy must not break down in a misleading way; note its limit in one phrase. Avoid jargon in levels 1 and 2. Do not exceed 220 words total. OUTPUT FORMAT: Three labeled sections (Level 1: Child, Level 2: General, Level 3: Practitioner), then a final line labeled 'Why it matters'.