tú: informal
usted: formal
vosotros: familiar- only in Spain , to males or mixed group.
vosotras: familiar- only in Spain , to a group of females.
ustedes: plural, formal or informal.
The answer would be A
Las montañas mean the mountains
El parque means the park
El gimnasio means the fitness center
El cine means the movie theater
Since el campo is the countryside or the field then you can eliminate C and D since those are in the city, you would then eliminate B since its a park. You would be left with A since the mountains can be found on the countryside.
Hope this helps! :3
1. El caballero repite que el puede realizar su tarea.
2. Ella tiene probablemente unos treinta.
Thats the meaning in Spanish. I hope it helps.