The article "the melting arctic" attempts to win over public opinion by making use of persuasive techniques. one such technique is the use of , which relies on proofs, graphs, and charts. the article also relies on , which involves the endorsement of an idea or opinion by a renowned professional in that particular field. in contrast, the noaa video uses visuals of animals to appeal to the viewer’s . it makes claims about the worsening arctic conditions and the adverse effects they have on animal life.