This question is a bit tricky! The processes that transform metamorphic and sedimentary rocks into sediment are actually the same processes that break down all rocks. They are:

1. Weathering: This is the process where rocks are broken down by forces like:

* Physical weathering: This involves things like freezing and thawing of water in cracks, abrasion by wind or water, or plant roots growing in cracks.

* Chemical weathering: This involves reactions with water, acids, or oxygen, which can dissolve or alter the minerals in the rock.

2. Erosion: This is the process of moving the weathered rock fragments from their original location. This can be done by:

* Wind: Wind carries small particles of sediment.

* Water: Rivers, streams, oceans, and glaciers can transport sediment.

* Ice: Glaciers can scrape and carry huge amounts of sediment.

* Gravity: Gravity pulls sediment down slopes.

3. Deposition: This is the process where the transported sediment finally comes to rest. This can happen in many places:

* Rivers: Rivers slow down and deposit sediment at their mouths.

* Oceans: Waves and currents deposit sediment on the seafloor.

* Lakes: Sediment settles to the bottom of lakes.

* Deserts: Wind deposits sediment in dunes.

Once sediment is deposited, it can eventually be lithified (turned into rock) through compaction and cementation, leading to the formation of new sedimentary rocks.