Charcoal is the end product of which process?a.biomass combustionb.biomass fermentationc.biomass digestiond.biomass pyrolysis

Charcoal is the end product of the process known as biomass pyrolysis. So, the correct answer is d. biomass pyrolysis.

Here are the steps to understand why:

1. Biomass combustion refers to the burning of organic materials, like wood or agricultural waste, to produce heat. The end product of this process is usually ash, not charcoal.

2. Biomass fermentation is a process where microorganisms like bacteria and yeast convert organic materials into alcohol or acids. This process is often used to produce biofuels, not charcoal.

3. Biomass digestion, also known as anaerobic digestion, is a process where microorganisms break down organic materials in the absence of oxygen. This process produces biogas, not charcoal.

4. Biomass pyrolysis is a process where organic materials are heated in the absence of oxygen. This process produces charcoal, along with other products like bio-oil and syngas. Therefore, charcoal is the end product of biomass pyrolysis.