2. What is the purpose of a party's national convention? *

to select the party's nominee for president.

that would be the steamboat because none of the other things are forms of transportation

answer is b.

  it is always the best policy to have good communication and good relations between individuals and, specially, between leaders of the countries. for this purpose, among others, there is a common place, the united nations, where the representants can present his and learn about the other country's policies.