Answer:
Plate tectonics
Explanation:
Plate tectonics explains the features and movement of earth surface in the present and the past.
These plates are pieces of cracked shell that rest on the hot , molten rock of earth's mantle. The heat from the radioactive processes within the planet's inferior causes the plates to move, sometimes towards and sometimes away from each other.
These rocks collected were as a result of plate tectonics which drifted away.