This question is incomplete. Here is the complete question:
Indica a qué o a quién se refiere cada pronombre subrayado.
La cadena (channel) GBJ va a retransmitir esta noche el controvertido video musical del grupo Niquis, que muestra al cantante protestando contra la guerra (war). El director de la cadena, Alberto Anaya, (5) nos envió un fax a los periodistas (journalists) para (6) informarnos de su decisión. La Asociación de Televidentes, al enterarse, afirma que (7) le va a pedir explicaciones al señor Anaya por (8) emitirlo en horario infantil. "No les debemos permitir a las cadenas este comportamiento. No (9) se lo vamos a consentir", dijo.
Answer:
5) Refers to us, journalists. (Nosotros, los periodistas).
6) As in the previous case, it also refers to us, the journalists.
7) It refers to La Asociación de Televidentes ..
8) It refers to the controversial music video of the Niquis group.
9) They will not allow that kind of behavior to television networks.
This class of pronouns in Spanish are used to refer to things that have already been named before, in order to avoid repetition, otherwise the sentence would not look good.
They are words that will replace nouns.
In this case the examples belong to personal pronouns, which fulfill the function of replacing the subject in the sentence.