What causes the sound of thunder? By Rabia Anum ✅ Fact Checked 📊 Difficulty Medium 📅 Last Updated 13 Aug 2026 A. Hail collisions B. Vacuum collapse C. Rapid expansion of superheated air D. Cloud vibration Check Answer 💡 Explanation: Thunder is the shockwave caused by the rapid heating and expansion of air in the lightning channel. 📚 Topics: Geography Natural Phenomena 🎯 Exams: CSS GEN NTS PMS