Which of the following is not a likely component of soil formed during primary succession?

select one:
a. rock fragments
b. cast-off parts of shrubs and trees
c. dust particles from the air
d. decayed lichens and bacteria

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction