The balance between the weight of a mountain range and the buoyancy provided by the underlying mantle is termed

The answer is; Isostasy

Just like a boat displaces water in which it floats, so does the solid lithosphere on the fluid asthenosphere. The heavier regions of the lithosphere, such as those with high mountains above them penetrate deeper into the asthenosphere and displace a huge portion. Isostasy occurs when each block settles into equilibrium with the underlying mantle (buoyed with a force equal to the weight of the displaced fluid).

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;

i believe this is