Question

sus padres viven en españa.
viven en españa.
tú y ana hablán mucho.
hablan mucho.
nuestra madre es azafata.
es azafata.

Explanation:

This is a Spanish grammar exercise replacing subject nouns with matching subject pronouns:

1. "Sus padres" (their parents) is a 3rd person plural masculine/feminine subject, so we use the pronoun "Ellos".
2. "Tú y Ana" (you and Ana) is a 2nd person plural + singular subject, so we use the pronoun "Ustedes" (or "Vosotros" in informal Spain Spanish, but "Ustedes" is standard universal).
3. "Nuestra madre" (our mother) is a 3rd person singular feminine subject, so we use the pronoun "Ella".

Answer:

1. Ellos viven en España.
2. Ustedes hablan mucho.
3. Ella es azafata.