Which of the following best explains the factors that led to the dust bowl?

a.
humans had been farming the land for too long without droughts.
b.
temperatures suddenly increased and brought on drought conditions.
c.
poor farming techniques that killed the soil were combined with drought.
d.
humans employed bad soil management practices that were unsustainable.

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.