Charles Darwin’s study of the Galapagos finches led to an understanding of evolution. How is evolution studied?

Evolution is studied through fossils records, case studies, and DNA evidence

Explanation:

fossils records provide the simplest evidence of the presence of an organism and their time of existence. example are footprints, bones etc

Case studies helps to determine the total evolution of species on organisms.

"DNA evidence of an organism has sequences which mutate over a period of time and results in changes in organism’s genetics which later on evolve into new specie. Hence, the DNAs help to find the ancestors of the organism and also figure out the organism specifically related to. The process of study of evolution is known as Phylogenetics" (link)

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.

c is the answer to this question. altitude affects the weather because air molecules evaporate.