What role does the asthenosphere play in the movement of tectonic plates

The asthenosphere in plate tectonic theory. The asthenosphere is now thought to play a critical role in the movement of plates across the face of Earth's surface. ... Some observers have described the asthenosphere as the 'lubricating oil' that permits the movement of plates in the lithosphere.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.