So, you will create an outline of the Guatemalan you visited. Do this in english. Nobody will be able to help with this as we do not know the town.
1-Yo soy amigo de Marcos.
2-Marcos y yo somos muy buenos amigos.
According to the option provided the answer would be "¡ Ella está guapa en su traje de novia!" This would mean that she is pretty in her wedding dress.
if we pay attention to the verb form, it might be said that it agrees in gender and number with the subject pronoun "ella". It is 3rd person singular and feminine. <span />