The first step in the rock cycle turning metamorphic and igneous rocks into sedimentary rocks is weathering.

Here's why:

* Weathering is the process where rocks are broken down into smaller pieces (sediments) by forces like wind, rain, ice, or chemical reactions. This is the crucial first step because it creates the raw material needed for sedimentary rock formation.

Let me know if you'd like more information about the other steps in the rock cycle!