Here's the classification of nouns from Ex. 1:
Note: Some nouns can be both countable and uncountable depending on the context (e.g., 'fish' can be countable when referring to individual fish, or uncountable when referring to the food). In this context, they are generally treated as uncountable food items except for 'apples', 'onions', 'potatoes', 'bananas', 'carrots', 'tomatoes', 'eggs', 'biscuits' which are clearly countable.