A black substancethat comes from burningwood?

The black substance that comes from burning wood is called charcoal. It is primarily composed of carbon and is created through the process of pyrolysis, where wood is heated in the absence of oxygen, causing it to decompose without combustion. Charcoal is often used for cooking, heating, and as a filter material due to its absorbent properties. Additionally, it can also refer to soot, which is a byproduct of incomplete combustion.