Final answer:
Gender, diet composition, and ethnicity all affect the metabolism of alcohol.
Step-by-step explanation:
The metabolism of alcohol is affected by all of the above: gender, diet composition, and ethnicity.
1. Gender: Women metabolize alcohol more slowly than men. This is because men generally have higher levels of enzymes involved in alcohol metabolism, such as alcohol dehydrogenase.
2. Diet Composition: A person's diet can affect the rate at which alcohol is metabolized. For example, consuming food with high fat content can slow down alcohol metabolism.
3. Ethnicity: Different ethnicities may have variations in the enzymes involved in alcohol metabolism, which can affect the rate at which alcohol is metabolized.