Correct Answer: (d) Human habitation
Solution:Soil research has shown that soil profiles are influenced by five separate, yet interacting, factors: parent material, climate, topography, organisms, and time.
Soil scientists call these the factors of soil formation. Apart from Climate, other major factors which are responsible for the formation of the soil are Relief, Parent Rock, Time, flora, fauna and microorganisms. Thus, human habitation is not a soil-forming factor.