will mark you brainless. Choose the best description, the definition for Uniformitarianism. Question 1 options: is based on the idea that the earth's physical landscape is the result of processes and forces that are man-made is based on the idea that earth's physical landscape is the result of processes and forces that have happened uniformly (in the same way) since the earth formed. is based on the idea that the earth's physical landscape is the result of catastrophic events is based on the idea that earth's physical landscape is the result of the uniform development of the earth's layers.