Food and foods

Hello.

I'd like to know whether the following sentences sound natural to a mother tongue speaker.
1) What's cheese? - It's a food.
2) What's wine? - It's a drink.
3.1) What are meat and vegetables?
3.2a) - They're foods. / 3.2b) - They're types of food. / 3.2c) - They're kinds of food.

Thank you.