Summarize this chapter for a student. Rules:
1. Cover every topic and key point; do not skip anything.
2. Keep it short: brief bullet points, no long paragraphs.
3. Make it visual: use tables for comparisons, simple text diagrams or flowcharts for processes, and bold for key terms.
4. Use simple language and give one short example for each hard concept.
5. End with a 5-line quick-revision recap.
Summarize this chapter for a student. Rules:
1. Cover every topic and key point; do not skip anything.
2. Keep it short: brief bullet points, no long paragraphs.
3. Make it visual: use tables for comparisons, simple text diagrams or flowcharts for processes, and bold for key terms.
4. Use simple language and give one short example for each hard concept.
5. End with a 5-line quick-revision recap.
