The answer is letter A. Rocks form and
erode at the same rate now as in the past and by the same means.
Uniformitarianism is an assumption that the same
natural laws and processes which is applied everywhere in the universe is the
same processes and natural laws in the past.
It includes the gradualistic idea that: The present is the key to the
past” which is at the same rates, functioning. Uniformatirianism is the prime
principle of geology and virtually all fields of science.
