If the whole first sentence was bolded then it's an independent clause because it can be by itself. However, none of it's bolded.
If ur asking if it's a fragment or a complete sentence,it's a fragment. I don't really understand what ur asking so I can't really help you. I'm sorry
Plagiarizing is the act of not giving Ann author or person recognition for their work and using it as your own. The second one is definitely plagiarized because there is no place that specifically references a source. The third one would also be considered playwriting because it does not use the correct notation for quoting a source. That makes the fist one not plagiarized.
