Because it displays the number of organisms at each tropic level.
I can tell you what topic outline mean...
A topic outline lists words or phrases. A sentences. A topic outline arranges your ideas hierarchically (show which are main and which are sub-points), in the sequence you want, and shows what you will talk about.
Hope this Help!:)
<u>Explanation</u>:
Here is a literal translation of the text from the source language_Spanish into English:
<u><em>"Once you have selected the company for your project, be sure to research its most relevant information, so that the recommendations you make during the project are as feasible and in keeping with the reality as possible."</em></u>
