Respuesta :
Answer: claim.
Explanation: a claim is an statement made by the writer that is supportable with evidence buy it is not a fact. In this case the author claims that "the solution is in our hands". A quotation is a group of words taken from another source, and repeated. Reasoning involves all the explanation about why the author thinks his claim is correct (in this excerpt we don't see any explanations), and the evidence are the details that can prove the claim (there are no details neither in the excerpt).