Using coal, steam, and the fischer-tropsch procedure converts coal into a liquid fuel

Answer;

Oxygen

Using coal, steam, and oxygen, the Fischer-Tropsch Procedure converts coal into a liquid fuel.

Explanation;The Fischer-Tropsch process is a series of chemical reactions that involve the conversion of hydrogen and carbon monoxide into liquid hydrocarbons by using a catalyst. Coal liquefaction is the process by which coal is converted to liquid hydrocarbons. This is done using the Fischer-Tropsch process. The process is a key component of gas to liquid technology. It produces synthetic lubrication oil and synthetic fuel including natural gas, biomass or coal.

That is true tge cactus as a structural adaptation to its envirinment has it leaves reduced to spines. but this doesnt mean it cant produce food it produces food because of the presence of chlorophyll in its stem