Excerpt 1. Scientific data: it presents information <em>related to science.</em>
Excerpt 2. Expert opinion: it´s an opinion of a person with <em>high level of</em> <em>knowledge</em>. "Accordint to <em>Morten Olsen</em>, chair of a recent <em>Artic assessment</em> on 2-Artic snow and ice-conditions"
Excerpt 3. Association: a feeling that <em>relates</em> to something. <em>"like a cruising jet"</em>
Excerpt 4. Emotional appeal: a way that uses the <em>emotions</em> to convince the audience. <em>"...the melodious songs of these beautiful birds might be silenced forever."</em>
Nathan filled the knothole in the tree to prevent Boo from giving the children gifts. To trick the children, he told them the tree was sick and the knothole needed to be filled.
