Step 1: Concept Charcoal is a solid carbon residue produced from organic matter.
Step 2: Meaning The conversion requires high temperatures and a controlled environment.
Step 3: Analysis Pyrolysis is the thermochemical decomposition of organic material at elevated temperatures in the absence of oxygen. During this process, volatile compounds are driven off, leaving behind carbon-rich charcoal.
Step 4: Conclusion Pyrolysis is the fundamental process for charcoal production.
Final Answer: (B)