The best tool to use to locate the boundaries between countries is a(n)?

The red square is a famous historical site that is located in

What is the general rule about surface currents? cold water flows along the ocean floor towards the equator. the east coasts of continents have cold surface currents, and the west coasts of continents have warm surface currents. seasonal and constant offshore winds create significant upwelling along the west coasts of south and north america and africa. the west coasts of continents have cold surface currents, and the east coasts of continents have warm surface currents.

Can someone me with this plz? ! i'm putting 20 points on it!