Answer:
1. Viscous Drag
2. Slab-Pull Force
3. Ridge-Push Force
Explanation:
The three factors that drive plate motion in the asthenosphere are as follows:
1. Viscous Drag
2. Slab-Pull Force
3. Ridge-Push Force
Asthenosphere is the upper layer of the earth's mantle. This layer lies below the lithosphere at depths between approximately 80 and 200 km below the surface.
LAB refers to the lithosphere–asthenosphere boundary.
