Question

which of the following is compressional stress?
o when the forces are directed inward, reducing the rocks volume
o rocks do not experience compressional stress
o when a rock mass is pushed in opposite directions
o when the forces are directed outward, increasing the rocks volume

Explanation:

Compressional stress occurs when forces act inward on a material, reducing its volume. In the context of rocks, this is a valid type of stress. Pushing a rock - mass in opposite directions is shear stress, and forces directed outward cause tensional stress. Rocks do experience compressional stress.

Answer:

When the forces are directed inward, reducing the rock's volume