Water beacause water shapes lanscape from erosion If you want to be a real smart-alec you could say lava instead.
A liquid has a certain volume, flows, and assumes the shape of it's container.
gas
It is Slope , Volume of flows , and Streamed Shape.
Well it depends on how bad the lava flow is. If the lava is flowing slow then the shape of the volcano won't change much, But if it flows with force then bits of the volcano will fall off and change the shape of the volcano. Hope this answer helps!!
Gas
Water has no shape, it is a liquid. By gravity it naturally fills any space of any shape that it flows into.
liquid
A fluid. A fluid [can be liquid or gas] flows to adopt the shape of whatever contains it.
Liquid flows because of its viscosity.
A delta
The cell wall helps keep the shape of the cell.
Amoeba