How could this sentence be rewritten to maintain a formal tone?
Kids should really study foreign language to learn
about lots of cultures.
Kids you know you want to sign up to learn a new
language and culture!
Students should take a bunch of classes that allow
them to learn new cultures.
Students should study foreign language to be
exposed to new cultures.

Students should study foreign language to be exposed to new cultures.

Explanation:

this sentence refrains from colloquial language. this makes it sound more formal than "kids," "really," and "a lot/lots."

it also uses a third person point of view which is more formal than first and second person.

reescriba la oración completa para incluir la forma posesiva de "declaración de derechos" en la oración a continuación.

la declaración de la declaración de derechos de que "todos los hombres son creados iguales" se aplica a todos.

i think the answer is c