I'm doing an acrostic poem about river processes for geography and i can't think what to put next, i need a sentence starting with o and s.

Political boundaries are determined by the political party in control at the time. true or false

Which of the following best describes the circumstance under which countries block the importation of certain products into their country? a. importation blockade b.trade barrier c.trade inhibitor d. domestic protection act

__ has (or have) been one of the most common pull factors of migration within the united statesa. lack of humanityb. gamblingc. seafoodd. well paying jobs