Volcanoes are often called the ‘safety valve of nature’ because they allow the immense heat and pressure accumulating within the Earth’s interior to escape. Without these vents, the internal pressure generated by molten magma and gases could potentially lead to catastrophic crustal fractures, much like a pressure cooker releasing steam to prevent an explosion. ANSWER: (A) Volcanoes
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The Earth’s interior is a high-temperature environment where radioactive decay and residual heat create intense pressure. Volcanoes act as natural pressure-release mechanisms. When the internal pressure of gases and magma exceeds the strength of the overlying crust, an eruption occurs, releasing this energy. This process maintains the Earth’s thermal equilibrium. By providing a controlled (albeit often violent) exit for subterranean energy, volcanoes prevent the buildup of pressure that could otherwise lead to even more massive and unpredictable global tectonic shifts. Therefore, they are essential for the geological stability of the planet over millions of years.