These geographic factors aided russia in its expansion efforts. select all that apply. fertile soil few natural barriers harsh climate high elevations

The correct answers are:

- few natural barriers;

From its original territory in Eastern Europe, Russia managed to expand greatly and become the biggest country in the world by far, and one of the biggest reasons for that was the relatively easy terrain, and the lack of natural barriers that were going to set the Russians back.

- harsh climate;

The fact that the climate is very harsh in the territories that Russia gained, meant that very small amount of people live in those areas, thus the resistance was relatively small and insignificant, so the Russians managed to gain the desired territories with relative ease.

answer; i believe the correct answer is (a) nigeria is the largest african crude (oil) supplier; /// so revenue from petroleum;

a characteristic is a deep cut in the earth or left over rock aka till.