Answer:
primary election
Primary elections, often abbreviated to primaries, are a process by which voters can indicate their preference for their party's candidate, or a candidate in general, in an upcoming general election, local election, or by-election.
runoff election
The two-round system is a voting method used to elect a single candidate, where voters cast a single vote for their preferred candidate. The election proceeds to a second round only if in the first round no candidate has received a simple majority of votes cast, or at least some other prescribed percentage.
genaral election
A general election is a political voting election where generally all or most members of a given political body are chosen.
special election
A by-election, also known as a special election in the United States and the Philippines, or a bypoll in India, is an election used to fill an office that has become vacant between general elections.