@ Mahikan

In a nutshell, an essay should be consist of the following:

Introduction ( Briefly explain what you intend to discuss and define your topic, for e.g. if you intend to discuss Global warming then start off with a definition.

Main body (Reasons, arguments, counter-arguments)

This part should be the heart and soul of your essay.

Discuss the effects of global warming, why we need to take action?, why some people think global warming is a scam? what action we can take to prevent global warming?

Conclusion ( Your opinion )

Express your opinion in accordance with the main body of the essay, your opinion should not be expressed in other part of the essay.

What ever you have written in the main body should be summed up in the conclusion, and in the end, give your opinion on the topic.

This is a very brief introduction to essay writing, I hope you will find it useful, as I keep reiterating, carry out your own research, and keep practicing