A. Alternative energy sources like solar and wind power
are always available
b. are only replenished with human intervention
are renewable
d. are more versatile than fossil fuels
C.

are only replenished with human intervention are renewable

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.