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.
Introductory paragraph. The Introductory paragraph introduces the paper's thesis to the reader. This type of paragraph is used not only to present the topic and organization of the paper but also to grab the reader's attention. When writing the introduction, it is probably best to use the funnel or general-to-specific method.