The answer is (usted) because you dont have a personal relationship with this person.
ustedes means you guys
vosotros means all of us
tu is used for someone whom you are close with like a family member or someone whom you have know for a while.
Answer:
de que se trata esta historia
Explanation:
Llanas means trowels
Agudas means acute
Padre is the answer. madre means mother so the masculine version of mother is Padre which means father.