Check your Understanding. 1.Explain why over 96% of the
human body is made up of only
four elements.

format change of dna.  

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.

d. planting trees

the trees take in carbon to make oxygen.