Provide an example of a function of an apple $($ what do we do with it$),$ a feature of an apple $($what it looks like$)$ and what class $($categorization$)$ the apple belongs to$.$

Describe a function, feature, class training protocol for training prompts for the examples you provide above. How would you train categorization of fruit from vegetable. Offer a short method of training a response to a function question set, a feature question set and a class question set.