Step 1: Concept Agricultural wastes like rice husk or sawdust have low bulk density, making them difficult to transport and burn efficiently.
Step 2: Meaning Densification is required to turn these materials into a solid fuel.
Step 3: Analysis Briquetting is the process where loose organic materials are compressed under high pressure (and sometimes heat) to form solid, high-density blocks called briquettes. While pelleting is similar, "briquetting" is the standard term for larger blocks produced from agricultural waste.
Step 4: Conclusion The process is known as briquetting.
Final Answer: (B)