Plagiarism is not telling the reader where sources and information came from.
The single easiest way to avoid plagiarism is to just cite where the knowledge came from. It needs to be clear EITHER in the text itself, or cited using MLA, APA, or other format. Either way, it then needs to be included in the Works Cited page so that the reader can find the information themselves.
DON'T:
Cheat
Use AI (like ChatGPT)
Fail to record your sources while researching
From UCLA " Be 100% scrupulous in your note taking. As you prepare your paper or research, and as you begin drafting your paper. One good practice is to clearly label in your notes your own ideas (write "ME" in parentheses) and ideas and words from others (write "SMITH, 2005" or something to indicate author, source, source date). Keep good records of the sources you consult, and the ideas you take from them. If you're writing a paper, you'll need this information for your bibliographies or references cited list anyway, so you'll benefit from good organization from the beginning." - https://guides.library.ucla.edu/citing/plagiarism/avoid
DO:
Cite your own work.
Cite your own images / photographs / drawings / graphs.
Write using CLEAR format