What is a common feature of areas defined as cohesion?

Areas defined as cohesion exhibit strong particle binding among clays due to the attraction between water molecules and clay particles. This cohesive property is primarily attributed to the surface charges on the clay particles, which lead to a moisture-holding capacity that influences the soil's overall structure and behavior. In cohesive soils, the fine particles create a compact and stable environment where the binding facilitates water retention and reduces permeability, impacting drainage rates.

In contrast, low nutrient retention, high water drainage rates, and increased pollution levels are characteristics associated with other types of soils or conditions. Cohesive soils typically have better nutrient retention capabilities due to their fine texture and ability to hold organic matter. High drainage rates are more associated with sandy or gravelly soils, which lack the particle binding necessary to retain moisture effectively. Increased pollution levels generally pertain to urbanized or industrialized areas, rather than defining cohesive soils specifically. Thus, the strong particle binding among clays is the hallmark characteristic of areas defined as cohesive.