Four-year-old graciela is a balanced bilingual, which means that she

Four-year-old Graciela is a balanced bilingual, which means that she speaks fluently both her native language and another second language.

Explanation:

With bilingualism we refer to the ability of a person to use two languages indiscriminately in any communicative situation and with the same effectiveness.

In young children, bilingualism usually occurs when the mother tongue of their parents is not the same as their mother tongue, that is, when children of immigrants speak the language of their parents and the language of the country in which they live.

i think it is the third one.