When colonization ended, many countries had to renegotiate borders that were established by foreign powers with the exception of Brunei
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Malaysia
Indonesia

answer; ///i believe the correct answer to the above question is; ///(drainage basin;

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.