Question

which law states that the oldest layers are at the bottom in horizontal layers of sedimentary rock?
law of inclusion
law of superposition
law of crosscutting

Explanation:

The Law of Superposition is a fundamental principle in geology that states in undisturbed horizontal sedimentary rock layers, the oldest layers are at the bottom, and each subsequent layer above is younger. The Law of Inclusion states that fragments within a rock are older than the rock itself, while the Law of Crosscutting states that a geological feature that cuts through another is younger than the feature it cuts.

Answer:

Law of superposition