Answer:
3.) Fermentation
Explanation:
Ethanol = EtOH = C₂H₅OH
Combustion:
CH₄ + 2O₂ --> 2H₂O + CO₂
Esterification:
R-CO₂H + R-OH --> R-CO₂H-R' + H₂O
Fermentation:
C₆H₁₂O₆ --> 2C₂H₅OH + 2CO₂
Polymerization:
Hydrocarbons combining to make longer hydrocarbon chains
