What heat source drives a geyser’s eruptions? By Rabia Anum 🌐 Source Geography Reference Library ✅ Fact Checked 📊 Difficulty Medium 📅 Last Updated 13 Aug 2026 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