his image shows the rock cycle.

The Rock Cycle. Arrows point from 1 stage to next. 1. Metamorphic Rock to point K to Magma to point V to Igneous Rock to Melting back to magma. 2. Metamorphic Rock to point K to Magma to point V to Igneous Rock to Heat and Pressure. 3. Metamorphic Rock to point K to Magma to point V to Igneous Rock to Weathering and Erosion to Sediment to Compacting and Cementing to Sedimentary Rock to Heat and Pressure to Metamorphic Rock. 4. From Sediment to Compacting and Cementing to Sedimentary Rock to Weathering and Erosion back to Sediment. 5. Metamorphic Rock to Weathering and Erosion to Sediment.

Which event most likely occurs at point K?

cooling
cementing
melting
weathering