Pls help me with this one (ignore what i pick)

Its the second one i think

Explanation:

Coz liquid can move faster then a solid obviously :)

most sediment washes or falls into the river as a result of mass movement and runoff. other sediment eroded from the bottom or sides of the river.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.