When writings a composition there are some vital and important aspect that a composition must have:

1. Introduction
2. The body
3. The conclusion

http://bit.ly/3e3xieJ
1.Introduction: Your introduction is a short part of your writing also it is at the first paragraph which give people idea of what you are writing about. At this point your introduction must be catchy. People check the first paragraph if it us interesting they continue but if it is not they wave it out.

1. The body:The body of your composition you talk about the topic which is divided into sub-topic or sub-theme. At this point you give proper information about your topic. Each paragraph take one point with full explanation.
2. Conclusion: This is a brief summary of what you have written. It must be brief and writing your overall impression on the topic.

Thanks