"She writes books."
Translation:Lei scrive libri.
"Lei scrive libri", "lei scrive dei libri" are both correct. The latter could be translated as "she writes some books" while the former "she writes books"
Verbs don't change for gender of the subject. It's "scrive" whether a boy or a girl is doing the writing.
Thanks, I was also confused about the singular and the plural forms of the nouns.
Regarding the incorrect answer, does "cats" translate as "gatte" or "gatti"? Or both?