Sounds like she's saying, "You munch on a banana!" talk about giving it away... :P
When i hover over a word I get a definition. For 'banana' is says 'banana (plug)'. what on earth is the 'plug' about?
I typed it correctly and got it wrong...is it because I left out the period?
Pronouns are largely optional in Italian, given how the verb conjugations encode 1st, 2nd, 3rd, singular, plural. But the pronouns do exist and are used, and so Duo just wants to make sure you're solid with it both ways.
i know un-una used for different gender but how to use them with the non-human with this example, why using "una" not using "un"?
Grammatical gender has nothing to do with biological sex. They're just labels given to noun classes. In Italian, "banana" just happens to belong to the noun class labeled "feminine."
A fairly easy way to tell what class a noun belongs to in Italian is to look at the last letter. Most of the time (there are some exceptions) this is a good rule of thumb:
-o - singular masculine
-i - plural masculine
-a - singular feminine
-e - plural feminine
Please note that this only applies to nouns and the adjectives that must agree with them. This has nothing to do with how verbs conjugate.