Just like a food chain, energy enters the food web at the trophic level of the producers, which can also be called autotrophs. In the desert, autotrophs are often some type of cactus, grass, or shrub.
The main purpose of the INTRODUCTION is to give a description of the problem that will be addressed. In this section the researcher might discuss the nature of the research, the purpose of the research, the significance of the research problem, and the research question(s) to be addressed. Three essential parts of a good introduction are: RATIONALE.
1. Write your introduction. Make sure your introductory paragraph states the name of the text, the author, and the focus of your paper. You may also want to include the year of publication and the publication it was taken from if relevant. It is also good to include the topic of the text and the author's purpose.