Question

If the parent rock is crystalline igneous, the soil will be __________.
A.Alluvial
B.Black
C.Red
D.Laterite

Answer 1

Hint: Soil transforms into mineral soil particles through a mechanism involving weathering, fracturing, and comminution of rock. Depending on the strength of the influences that are brought to bear, these processes grow at various speeds.

Complete answer: The term Soil refers roughly to the upper layer of the soil in which the life of plants, animals, and humans occurs. This surface layer, as its composition is subject to changes under the influence of physical, chemical, biological, and anthropogenic influences, is distinct from rocks or sediments in deeper layers.
-Under the influence of physical, chemical, biological, and anthropogenic influences, its composition is subject to change. The creation of vertical layering results from these changes: so-called soil profiles and soil horizons (zone of the soil profile that can be discriminated against due to its color and other morphological characteristics from other zones).
-Three phases in the soil can be distinguished:
Free-phase phase (minerals and organic material, among which living organisms)
Step of liquid (water and the therein dissolved nutrients)
Gas process (e.g. oxygen of importance for the respiration of roots)
-In areas of low rainfall in the eastern and southern parts of the Deccan plateau, red soil grows on crystalline igneous rocks. Red soil is a type of soil that grows under deciduous or mixed forest in a humid, temperate, moist environment, with thin organic and organic-mineral layers overlaying a leached yellowish-brown layer resting on a red illuvium layer. In general, red soil is derived from crystalline rock.

Thus, the answer is option C: Red

Note: The rise in the number of species and individuals of soil animals is a significant factor for soil production. The top layer is blended and aerated by the action of roots and fauna. A soil profile (see figure) is formed in certain forms of soil due to the relocation of minerals and organic matter. The pace at which such a profile evolves is dictated by climatic and other local factors but on a local basis.