Answer:
National Convention
Step-by-step explanation:
National convention can be said to be a national meeting of delegates elected in primaries, caucuses, or state conventions who assemble once every four years to nominate candidates for president and vice president, ratify the party platform, elect officers, and adopt rules.
This is also a convention of a political party usually composed of delegates chosen by state primaries or conventions and meeting primarily to nominate candidates for president and vice-president and to adopt a platform.
One of the primary thing political parties do in a national convention is to elect officials that will lead their political party, elect the candidates that will represent them in an election and adopt new policies to govern their party.