Is that yours?
Would you dare sell lemonade and label it “Toomer’s” if it wasn’t their special recipe? Of course not. That’s illegal. Would you copy parts of a project from the Internet or from a friend and turn them in as your own? You hopefully wouldn’t do that either. That’s plagiarism. While not illegal, forgetting to properly create your own ideas can lead to a nasty lesson in court if the habit ever gets entangled with real-world business and copyright law. Here’s a PSA: don’t take what’s not yours.