Which of the following is a key property of cohesive bank material?

Answer: B — More resistant to erosion and has low permeability

The key property of cohesive bank material being more resistant to erosion and having low permeability is an important characteristic in understanding how such materials function in various environmental conditions. Cohesive materials, such as clay, have closely packed particles that create strong interparticle forces, making them less susceptible to being washed away by water flow. This resistance to erosion is crucial in maintaining the integrity of riverbanks and shorelines. Additionally, the low permeability of cohesive materials means that they do not allow water to pass through them easily, which can lead to a higher likelihood of saturation during heavy rainfall or flooding events. This characteristic can impact how the material behaves under stress and the overall stability of structures built on or near these types of soils. Understanding this aspect is essential for assessing the performance and durability of earthen banks and the environments where they are utilized.