Question

question 5
what is the ultimate driving force behind all forms of mass movement?
cohesion
friction
surface tension
gravity

Explanation:

Gravity is the force that acts on mass, causing it to move. Cohesion is the attraction between similar molecules, friction opposes motion, and surface tension is a property of liquids' surfaces. Mass movement (e.g., landslides, snow avalanches) occurs due to gravity pulling mass down - slope.

Answer:

gravity