The latter in effect allows the government to appeal the opposition of parliament to the electorate. However, in many jurisdictions a head of state may refuse a parliamentary dissolution, requiring the resignation of the prime minister and his or her government. In most modern parliamentary systems, the prime minister is the person who decides when to request a parliamentary dissolution.

Answer this question, if possible (if impossible, reply "unanswerable"): If the head of state prevents the dissolution of parliament, what needs to happen?
resignation of the prime minister and his or her government