The awnser is A. Al parque
For number 6, the answer is d.
Bailas
Bailan
Estudio
Estudiamos
Estudiaron
Viajo
Viajaron
Ceno
Buscaste
Explique
Llevo
Esperamos
Practicaron
Trabajo
It would be to maintain their language and culture, because they're the type of people who TREASURES their culture, and don't like to change just to fit in.
I hope I helped! =D