What heat source drives a geyser’s eruptions? 👤 By The Quiz Wire 🌐 Source Geography Reference Library ✅ Fact Checked 📊 Difficulty Medium 📅 Last Updated 01 Dec 2025 A. Flooding B. Permafrost C. Underground magma/heat D. Pressure Check Answer 💡 Explanation: Geysers require a subterranean heat source (magma) to superheat water. 📚 Topics: Geography Natural Phenomena 🎯 Exams: CSS GEN NTS PMS