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.
The introductory paragraph should grab the readerâs attention and make him or her want to read the essay. The introductory paragraph can also provide background information that is necessary for the reader to appreciate the writerâs position. The introduction is an opportunity to shape the readerâs opinion about the writerâs main idea before the reader gets to the thesis statement. Finally, the introductory paragraph presents the writerâs thesis statement.