The correct answer is conventions.
Every four years, members of the Democratic and Republican parties meet at conventions to announce who their candidates will be for president and vice president. The selection of these candidates are based on the results of the primaries and caucuses held during the winter months. Then, in the summer, the parties meet at their respective conventions to announce their nominees.
Thomas Jefferson
Explanation:
A choropleth map (from Greek χῶρος "area/region" and πλῆθος "multitude") is a type of thematic map in which areas are shaded or patterned in proportion to a statistical variable that represents an aggregate summary of a geographic characteristic within each area, such as population density or per-capita income.
