It would be "mis"
"mis" and "mi" both mean my in English the difference is "mis" is plural and since her parents are plural it would be "mis" instead of "mi"
Translation
Marco: is that your parents wedding photo?
Marta: Yes, they are my parents.
El gato del mundo exterior
' Does he/she need to use these napkins'
There are different ways to say it, some people from other countries would say 'Do you need to use these napkins' but looking at the conjugation, I say it is 'he/she'
Hope this helps :)
1. Hace 12 años que estudio español.
2. Hace 7 años que uso la computadora.
3. Hace 5 años que estudie el ingles.
4. Hace 2 meses que no hable con mi profesor de español.