Types of Constituency
Plurality Electoral Systems
The plurality electoral system is the oldest and the most frequently used voting system. It is used for legislative elections in the United States and India--the world's two largest liberal democracies--as well as the United Kingdom and many former British colonies.
source:
aceproject.org
image:
slideplayer.com
Proportional Representation
Mixed member proportional representation (MMP), also called the additional member system (AMS), is a two-tier mixed electoral system combining a non-proportional plurality/majoritarian election and a compensatory regional or national party list PR election. Voters typically have two votes, one for their single-member district and one for the party list, the party list vote determining the balance of the parties in the elected body.
source:
en.wikipedia.org
image:
jet.com