Question

a layer - cake profile of different soil types is exposed when we dig into the earth. geologists reason that these layers were laid down sequentially, and that layers lower down have to be older than the layers above them. this is called the law of superposition cross - cutting relationships the jungle unconformities

Explanation:

The law of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and each successive layer is younger than the one below it. Cross - cutting relationships deal with features that cut through rock layers (like faults or intrusions) and how they relate to the age of the rock layers. "The jungle" is not a geological law. Unconformities are gaps in the geological record. Since the description in the question is about the sequential layering with lower layers being older, it matches the law of superposition.

Answer:

superposition