이거 풀어줄 사람 ㅠㅠ

Most people consider the landscape to be unchanging, but Earth is a dynamic body, and its surface if continually altering. There are two principal influences that shape the terrain: constructive processes such as uplift, which create new landscape feature, and destructive forces such as erosion, which gradually wear away exposed landforms. The Earth’s crust is thought to be divided into huge, movable segments, called plates, which float on a soft plastic layer of rock. Some mountains were formed as a result of these plates crashing into each other and forcing up the rock at the plate margins. In this process, sedimentary rocks that originally formed on the seabed may be folded upwards to altitudes of more than 26,000 feet. As soon as land rises above sea level it is subjected to destructive forces. The exposed rocks are attacked by the various weather processes and gradually broken down into fragments, which are then carried away and later deposited as sediments. Thus,  

 

 

 

 

① hills and mountains are often regarded as the epitome of relatively short-lived and are the eroded relics. 

② any landscape represents only a temporary stage in the continuous battle between the forces of uplift and those of erosion. 

③ an environment that varies from place to place supports more kinds of rocks than an environment that is uniform. 

④ undermining the cliffs, erosion would not leave any high mountains or hills finally. 

⑤ there is nothing permanent including the Earth so that people should try to preserve the entire environment. 

 

 

 

Thus 뒤에 나올 거!

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