Question

sometimes old rocks are affected by other geological features, as when molten lava forces its way through fractures in several layers on its way to the surface. the assumption that the intruding features must be younger than the layers of rock on which they intrude is called the law of

superposition
cross - cutting relationships
the land
unconformities

Explanation:

The law of cross - cutting relationships states that an igneous intrusion or fault (intruding feature) is younger than the rock layers it cuts through. The law of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top. Unconformities are gaps in the geological record. "The land" is not a relevant geological law in this context.

Answer:

B. cross - cutting relationships