Multiple alleles are caused by what? a) mutation b) incomplete dominance c) recessive genes d) none of the above

they are caused by mutation. the best example of it are human blood groups.

and after water is usually warmed by the sun the water temperature raises and then evaporates .

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.