1. fiasco in political terms, a formal decision to undertake some action
2. integrated open to all people
3. precedent the act of greatly increasing something, like nuclear stockpiles
4. proliferation to isolate a person or nation from the rest of the world
5. quarantine in law, the first decision of its kind
6. resolution a total and complete disaster or failure

fiasco is a thing that is a complete failure, especially in a ludicrous or humiliating way.

integrated means having been integrated, in particular.

precedent is an earlier event or action that is regarded as an example or guide to be considered in subsequent similar circumstances.

proliferation is a rapid increase in numbers

quarantine is a state, period, or place of isolation in which people or animals that have arrived from elsewhere or been exposed to infectious or contagious disease are placed.

resolution is a firm decision to do or not to do something.

hope this helps

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.

the answer wold be b) travel among nations should be regulated by an international organization