In a two-party system, one party typically holds a majority of seats in the legislature and forms the government, while the other party serves as the opposition.

The primary function of an electoral system is to determine the outcome of elections by translating votes into seats in a legislative body or other elected office.

In a single transferable vote system, voters rank candidates in order of preference. Seats are allocated to candidates based on the proportion of votes they receive, taking into account voters' preferences.

A two-party system often leads to stable and predictable governments because one party typically has a clear majority and can implement its policies without having to rely on support from other parties.

In a multi-party system, it is often difficult for any one party to gain a majority of seats in the legislature, which can lead to political instability and gridlock as different parties struggle to form coalitions and pass legislation.

Gerrymandering is the practice of drawing electoral district boundaries in a way that gives an advantage to a particular political party or group, often by concentrating their voters in certain districts and diluting their influence in others.

In a first-past-the-post system, the candidate who receives the most votes in a given constituency wins the seat, regardless of whether they receive a majority of votes.

Proportional representation systems aim to ensure that the composition of the legislature reflects the distribution of votes among different parties or groups, giving a voice to a wider range of political viewpoints.

In a first-past-the-post system, minority groups may be underrepresented in the legislature if their votes are concentrated in certain districts and diluted in others.

Campaign finance regulations aim to ensure that elections are fair and competitive by limiting the amount of money that candidates and parties can spend on their campaigns and by regulating the sources of campaign funds.

In a mixed-member proportional system, a combination of first-past-the-post and proportional representation is used to allocate seats in the legislature.

In a plurality-at-large system, voters cast their ballots for a number of candidates, and the candidates who receive the most votes win the seats, regardless of whether they receive a majority of votes. This system can make it easier for new parties to gain a foothold in the legislature.

In a mixed-member proportional system, it is often difficult for any one party to gain a majority of seats in the legislature, which can lead to political instability and gridlock as different parties struggle to form coalitions and pass legislation.

A runoff election is held when no candidate receives a majority of votes in the first round of voting. The purpose of a runoff is to ensure that the winner has the support of a majority of voters.

In a single transferable vote system, voters rank candidates in order of preference. If no candidate receives a majority of first-preference votes, the candidate with the fewest votes is eliminated and their votes are transferred to the next-highest-ranked candidate on each voter's ballot.