Question

which principle states that processes occurring on earth today have been occurring since earth formed?
uniformitarianism
sedimentation
correlation
superposition

Explanation:

Uniformitarianism is the principle that the same geological processes that operate in the present also operated in the past. Sedimentation is the process of depositing sediments. Correlation is about matching rock layers. Superposition is about the order of rock layers (younger on top of older).

Answer:

uniformitarianism