Question

_________ determines thickness of soil profile.
A. Climate
B. Time
C. Relief
D. Wind

Answer 1

Hint: Soil is an important part of the earth’s outermost layer known as the crust. It has a mixture of organic matter, minerals, grass, water, air, and other organisms. The soil profile results from the same parent rock having similar rock profiles but with unique characteristics according to their location.

Complete Answer:
Soil is formed under specific natural conditions and each of these elements contributes to this complex process known as soil formation. The soil of a place is closely determined by the nature of the parent rocks or the climatic conditions, natural vegetation, organisms, and time. These factors do not act or influence the soil independently but it acts in close association with each other and ultimately leading to a whole network of inter-relationships of complex nature. According to soil scientists, the material leading to soil formation is derived from the parent rocks which are found exposed on the surface. Time actually determines the thickness of the soil profile as many layers of sand, clay, humus, weathered rocks, etc. continue to get deposited over the already present layers of the soil and as one layer of soil takes many years to deposit. The soils are also transported by the movements of running water, wind, or any other agents of erosion or it may remain in their original position.
So, the correct answer is Option B.

Note: As a natural resource, soil is of immense value to humans. The nature and the fertility of the soil decide agricultural productivity which in turn depends on the carrying capacity of the soil and the level of development in the rural communities.