The diagram below shows part of the rock cycle. which type of rock does a represent? metamorphic rock rock formed by cooling rock formed by compaction sedimentary rock (if you cant open the image dont answer)

A represents sedimentary rock which comes from previously unconsolidated sediments that are buried relatively deeply within the earth's crust and the water is squeezed out of them in a process called diagenesis and then they are compacted into rock. This could explain a quartz sandstone. A quartzite on the other hand is a quartz rich sandstone that has been subjected to mild metamorphism, as an example.

Answer they are produced by collision of tectonic plates;