Those are the books that need to be returned to the library. what is the antecedent of the pronoun those?

d would be your anwser i belive, hope this .

sigh language, body language, and voice telepathy

i dont know if your mis-read or whatever but that says 30 points also. its not so very surprising knowing that the words he spoke was english, the aspect of his "language" i'd say is pretty rare and is very unique to pronounce.