Question

what soil class does sand belong in?
○ class c
○ class b
○ class d
○ class a

Explanation:

In soil classification (related to engineering and geology, which falls under Natural Science's subfields like Engineering or Environmental Sciences), sand - dominated soils with good drainage and high bearing capacity are classified as Class A. Class A soils are typically well - graded gravels, gravel - sand - clay mixtures, well - graded sands, or loess. Sand has the characteristics (good permeability, relatively high strength) that fit the definition of Class A soils. Class B is for soils like silty sands, gravel - clay mixtures, etc. Class C is for soft clays, silts, etc. Class D is for very soft clays, organic soils, etc. So sand belongs to Class A.

Answer:

D. Class A