The professor seemed very self-assured, but the students were afraid he would resign, which is why they re-signed the petition to investigate the falseallegations made against him, is your answer.
Hope that helps, if it does mark me brainiest, if it doesn't please don't! :)
Cambridge English Dictionary defines hyphen as " the symbol -, used to join two words together, or to show that a word has been divided into two parts at the end of one line and the beginning of the next".
The correct answer, with all the hyphens in the right places, is :
The professor seemed very self-assured, but the students were afraid he would resign, which is why they re-signed the petition to investigate the false allegations made against him.
cognates are recognizable words in other languages. They look very similar to their counterpart in English. if you look at the words spelling and use context clues it's pretty easy to guess what they mean