Question

along with parent material and time, the most important factors in soil formation are ______.
a. climate, altitude, and tectonic activity
b. organisms, tectonic activity, and water quality
c. organisms, altitude, and slope
d. climate, organisms, and slope

Explanation:

Soil formation factors include parent material, time, climate, organisms, topography (slope, altitude), etc. Option C has organisms, altitude (topography), and slope which are key factors. Option A has tectonic activity which isn't a primary soil - forming factor. Option B has tectonic activity and water quality (not a main factor). Option D misses altitude which is part of topography. So the correct option is C.

Answer:

C. organisms, altitude, and slope