A business monopoly is where one business dominate/accounts for 100% of the market. There are many buyers but one seller, high barriers to entering/exiting the market, and the business is a price setter
In most parliamentary democracies, the party in power calls (or holds) an election every five years. However, if the parliament does not care for or have trust in the Prime Minister, he or she can be removed from office and another election for the position can be held.
We would die because the other gases in the air, such as nitrogen, dilute it and make it safe to breathe