A sedimentary rock made up of fragments of other rocks, like breccia, is called a clastic sedimentary rock.

Here's why:

* Clastic refers to the fact that the rock is made up of fragments (clasts) of other rocks.

* Sedimentary refers to the process of how the rock formed, which involves the accumulation and cementation of sediments.

Breccia is a specific type of clastic sedimentary rock characterized by its angular fragments.