Step 1: Concept
Most joining processes like welding, soldering, and brazing rely on thermal energy to melt a filler or the base metal.
Step 2: Meaning
Mechanical fastening can provide a permanent bond using physical deformation instead of heat.
Step 3: Analysis
Riveting involves placing a metal pin (rivet) through holes in the metal sheets and then deforming the "tail" end to lock the pieces together. It is done at room temperature and is a permanent mechanical joint.
Step 4: Conclusion
The correct process is riveting.
Final Answer: (C)