In the CK-12 video "Engineering Trash into Treasure", what four agricultural wastes can be used to turn into charcoal? HELP ME ASAP

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

correct answer is a. and d.