Which does NOT describe primary succession? A. Decomposing organic matter forms soil
B. Presence of existing fertile soil
C. Long-term occurrence over extended time
D. Barren land once covered by glacier

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem

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.