Which type of barricade uses a select cohesive earth fill, free from unhealthy organic matter?

The correct answer pertains to the characteristics of artificial barricades, which are specifically constructed using materials that meet certain engineering standards. In this case, the phrase "select cohesive earth fill" indicates a material that is intentionally chosen for its properties, enhancing its effectiveness as a barricade. The requirement for the fill to be "free from unhealthy organic matter" further underscores the focus on using reliable, engineered materials rather than those that may decompose or degrade over time, which could compromise the barricade's integrity.

Artificial barricades are deliberately built to serve a particular purpose, such as controlling erosion, preventing water flow, or providing noise barriers. The selective nature of the materials used ensures that they are suitable for the intended engineering applications, providing the necessary strength and stability.

Natural barricades, on the other hand, refer to formations that occur without human intervention (like hills or trees), while permanent and temporary barricades vary based on their intended duration and method of construction but may not specifically mandate the types of materials used as artificial barricades do.