Respuesta :
Answer:
Cliff and Cracks, Sink under ocean I know for sure.
Explanation:
We have mountains because of convergent plates. they push eachother up and make cliffs. i also know sink under the ocean because we have underwater volcanoes for that reason
Part of the crust may sink under the ocean.
- History is the biggest witness of it.
- Many times in past the crust of earth sinked down in ocean due to earthquake and the crust below the ocean came up(Formation of Newzealand)