The correct answer is A. fermentation.
Fermentation is a metabolic process that converts carbohydrates into alcohol or acids using enzymes. It is used to make alcoholic beverages, such as wine, beer, and cider. It is also used to make bread, yogurt, and cheese.
B. Catalysis is a process that speeds up a chemical reaction without itself being consumed.
C. Conjugation is a type of chemical reaction in which two molecules are joined together by a covalent bond.
D. Displacement is a type of chemical reaction in which one atom or group of atoms is replaced by another atom or group of atoms.
Fermentation is the correct answer because it is the process that is used to make wine. The other options are not correct because they are not used to make wine.