Which of the following contributes to reduced shear strength in a potentially unstable slope?

Reduced shear strength in a potentially unstable slope is often influenced by the disturbance of sensitive materials. When these materials, which may include clay and other fine-grained sediments, are disturbed, their cohesion can be significantly reduced. This loss of cohesion weakens the slope, making it more susceptible to failure. Sensitive materials can behave differently under stress, and disturbances like vibrations, water infiltration, or mechanical disturbances can lead to a rapid decrease in shear strength.

Understanding the role of sensitive materials is crucial in geological assessments of slope stability. Slope failures often occur when natural forces, such as rainfall or human activities, alter the integrity of these sensitive layers. This highlights the importance of controlling disturbances in sensitive areas to maintain the shear strength necessary for slope stability.