What three basic parts are clearly presented in the essay?

Introduction, body, conclusion

An introduction is the opening of an essay or speech, which typically identifies the topic, arouses interest, and prepares the audience for the development of the thesis. Also called an opening, a lead, or an introductory paragraph.

The part of an essay, report, or speech that explains and develops a main idea (or thesis). Body paragraphs come after the introduction and before the conclusion. The body is usually the longest part of an essay, and each body paragraph may begin with a topic sentence.

The conclusion of the essay. The function of the essay's Conclusion is to restate the main argument. It reminds the reader of the strengths of the argument: that is, it reiterates the most important evidence supporting the argument.

Introduction and info. about the topic (its current condition, importance, ways to conserve it) and then the conclusion