Which bacterium is known for oxidizing alcohol into acetic acid?

The bacterium known for oxidizing alcohol into acetic acid is Acetobacter. This genus of bacteria plays a crucial role in the production of vinegar through a process called acetous fermentation, where it converts ethanol (alcohol) into acetic acid in the presence of oxygen. Acetobacter species are aerobic and thrive in environments where they can access both oxygen and alcohol.

The other options, while they are important in fermentation processes, do not primarily focus on the oxidation of alcohol to acetic acid. Enterobacter is more commonly associated with various fermentation processes but doesn't solely oxidize alcohol like Acetobacter. Lactobacillus primarily converts sugars into lactic acid and is key in dairy and vegetable fermentations, but it does not oxidize alcohol to acetic acid. Pediococcus is also involved in lactic acid fermentation and does not have the capability to convert alcohol into acetic acid in the way that Acetobacter does. Thus, Acetobacter's specialized role in this oxidation process makes it the correct choice.