How do these animals most likely make up for not being able to store adequate energy in fat reserves? A) by arousing from hibernation every day to venture outside their burrows to forage for food
B) by breaking down the chemical energy stored in other parts of their bodies, such as their muscles
C) by storing extra food in their burrows so that they can refuel during periodic arousals from hibernation
D) by lowering their metabolic rates so drastically that their bodies require a

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

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.