The uniformitarianism states that the forces that are changing Earth's surface today are the same forces that changed Earth's surface in the past which is because of the presence of the same types of agents being present.
This type of doctrine which was founded by James Hutton and made popular by Charles Lyell in the 19th century talks about how the earth's geologic processes are the same as a result of the agents of weathering being the same in this type of scenario.
Weathering on the other hand can be defined as the process in which rocks are broken down into smaller particles to form different types of soil. The agents of weathering has been the same today and in the past which makes it constant.
Hence, the reason why Uniformitarianism was chosen as the most appropriate choice.
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