<span>The mountains and deserts in western and southwestern China slowed the exchange of ideas</span>
Answer:
Convention: Once the primaries and caucuses are completed in each state, a national convention is heald in which a party's nomination for president is formally announced to the public. During the convention, the elected delegates cast their vote for a party candidate and the candidate with the most delegates gets the party's nomination.
Brainleist?
India
It's India because they needed vast caste system.
