It'd either be Sentence 2 or Sentence 12. But, I think that sentence 12 would be the best choice to choose.
I hope this helps, sorry if I'm wrong.
Thank you for the posting of the question however it seems that there is no sense to this question. can you read the question yourself and determine if someone else without your paper/computer screen can interpret this reasonably well? is this even english question
Us and we are the pronouns in this sentence!
Answer:
A paragraph is a section of writing which consists of one or more sentences grouped together, which deal with one subject or element of the writing as a whole.