Which process begins the formation of sedimentary rock? the movement of sediment the cementation of rock sediment the breakdown of rock into sediment the buildup of sediment in one location

the breakdown of rock into sediment

Explanation:

The sedimentary rocks are rocks that are formed from the material of the igneous rocks that had fallen apart, or rather the sediments. The breakdown of the rocks into sediment is what marks the beginning of the formation of the sedimentary rocks, and the reason why this can be considered as the beginning is because it is the basis, the material from which this rocks are formed. After the sediments are on place, with further processes over time, the tiny particles manage to merge, and as they do, they create a certain type of sedimentary rock, depending of the type of sediments, as well as other materials involved in it.

a. i. only is correct.