- She is (la) teacher... in this case the definite article " la" is used because it denotes that the same person is being talked about and that it is a female subject.
- Definite articles are usually used as a complement to something known to the listener; In the previous statement we can notice that it was already known by the listener that Mrs. Ortiz is the one who teaches the children, which makes us quickly conclude that she is the teacher, therefore we use the definite article "la".
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