Merriam Webster defines Plagiarism as “the act of using another person's words or ideas without giving credit to that person”.
Whether the product of your research is shared in print or in an oral presentation, you should include both in-text and bibliographic citations. You must also cite any images that you use, as well as charts, videos, audio recordings, and other works; if someone else created the content, the source of that content must be cited regardless of the medium in which it appears!
Aside from helping you to avoid plagiarism and to satisfy the requirements for the assignment, proper citations also:
EasyBib. “Determining What Is Plagiarism?” EasyBib, Chegg, 1 Jan. 2021, https://www.easybib.com/guides/plagiarism-guide/what-is-plagiarism/.
Merriam Webster Dictionary. (n.d.). Plagiarism definition & meaning. Merriam-Webster. https://www.merriam-webster.com/dictionary/plagiarism#note-1