Answer: Lava flow
Explanation: The sediments are carried away naturally by many agents such as water, ice, streams, lakes , river, et cetera.
Sediments are carried away from one place to another which is required for its movement for the formation of soil, to be available at the places where it is required to be.
The lava flow does not carries sediments from one place to another as it is very dense and it cannot carry sediments along with it.