Can someone explain why i shouldn't use "i" in a persuasive essay? and whats a better word than "i" to use?

You are not supposed to use any personal pronouns. Using personal pronouns show that you are using your opinion in an essay. This is bad because an opinion cannot be proven, and in an essay, your audience does not want your opinion, they want the facts.

plagiarism is a consequential action, and can result in many bad endings. for instance, you could possibly get expelled from a college or even your own school. you also have the potential of getting your work destroyed. it can also result in expulsion from you academic institution, in some cases permanent expulsion. plagiarism can result in legal action; fines and penalties etc.

hope this , and have a good day. c;