Geological Plate Process: Subduction Explained

The question asks to identify the specific geological process where one tectonic plate slides beneath another.

Defining Subduction

Subduction is the geological process where one tectonic plate moves downwards beneath another plate at a convergent plate boundary. This movement results in the denser plate sinking into the Earth's mantle. This definition directly matches the scenario described in the question, where "one plate slides beneath another".

Analyzing Other Options

• Advection: This term relates to the transfer of heat through the movement of fluids (like magma or water), not the physical sliding of tectonic plates.
• Convergence: This describes the general movement of two or more tectonic plates towards each other. While subduction is a type of convergent boundary interaction, convergence itself is a broader term and doesn't specifically describe the act of one plate sliding *beneath* the other.
• Convection: This is the process of heat transfer driven by the movement of heated material, particularly significant in the Earth's mantle. Convection currents help drive plate tectonics but are not the direct process of one plate sliding under another.

Therefore, the process where one plate slides beneath another is specifically termed Subduction.