which characteristic is shared by intrusions and faults?\nall are cracks.\nall are igneous rocks.\nall cause…

Brief Explanations:

Intrusions are igneous rocks that form when magma cools and solidifies beneath the Earth's surface. They are younger than the surrounding rocks they intrude into. Faults are fractures in the Earth's crust along which movement has occurred, and the displaced rock on either side of the fault is also younger than the surrounding undisturbed rock in terms of the geological time - sequence of events. Cracks are a more general term and not a defining shared characteristic. Intrusions are igneous rocks but faults are not. Neither all intrusions nor all faults cause gaps in the geologic record.

Answer:

All are younger than surrounding rocks.