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.
â Guide readers to important ideas in the body of the essay. â Provide relevant background information to help readers understand the essayâs purpose and thesis. Purpose and the Introduction. Before writing your introduction, it is important to determine whether your purpose calls for a formal. introduction. For example, in narrative writing, it is often acceptable to start with the first event in your. story, instead of providing background information.