The Executive branch must receive approval from "the Senate" when appointing heads of executive departments, ambassadors, and Federal Court Judges, since this is one of the most important examples of the system of "checks and balances" that exists in the US.
The answer is the one that starts with: to exchange ideas and services.
By urging the creation of a league of nations and u.s. membership in it, president woodrow wilson was proposing that the united states abandon its oldpolicy of isolationism instead, wilson proposed a new foreign policy of internationalism - cooperation with other nations for the good of the world.