I believe that the author included two anecdotes for the zoo animals, Lucy and Katina, to deepen the meaning of their character. Anecdotes can provide an understanding to their character and creates characterization and even imagery.
<h3>C. Presenting the ideas in a logical order </h3><h3 />
The outline helps you so that you can properly place your ideas in the correct and most sensible order.
Hope this helps. Good luck!