In which of the following does the land being moved contain approximately 60% water?

The correct option is mudflow.

Explanation:

Mudflow can be described as a flow of water which contains large amounts of silt present in it. Mudflow is generally known to occur in areas where there are steep slopes. Mudflow can cause extreme damages to people in those areas as well as their properties. Mudflow usually contains 60% water and the rest is silt and suspended particles submerged in it. Due to the particles, it has a high viscosity due to which it does not flow as water flow.