Why do developing countries experience greater growth?

Because since developing countries are still growing, when they finally get to the level of some more advanced countries the country as a whole feels a "greater growth"

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.