Final answer:
The statement accurately describes the characteristics of effusive volcanic material that cools to form a thick, brittle crust, which can break into rough pieces due to the brittleness of the Earth's crust and lithosphere.
Step-by-step explanation:
The statement refers to characteristics of effusive volcanic material which, upon cooling and solidification, can form a thick and brittle crust. This crust can be disrupted by tectonic forces or other stresses due to the brittle nature of both the crust and the lithosphere, resulting in rough fragments. The description matches known geological processes associated with volcanic fragmental rocks such as those formed during explosive volcanic eruptions that produce solid fragments and ash.
These materials, including larger fragments of rock, minerals, and volcanic glass, can create a layer on Earth's surface that undergoes further physical and chemical weathering. The crust and lithosphere, as well as the broader processes involved in the formation of solid crust and volcanic activity, are relevant to this description.