Levees and embankments allow humans to c)settle below river level. A levee is defined as "an elongated naturally occurring ridge or artificially constructed fill or wall, which regulates water levels." This definition can also be used for the term embankment.
Answer:
Dictatorship
Explanation:
In a dictatorship the dictator controls everything and needs to control all information that is released to the public to prevent things like uprisings to stay in power.
Number one is "sand dunes".
Number two is "the breakdown of rock through mechanical disintegration and physical stress."
India - Deccan Plateau
Pakistan - Khyber Pass
Sri Lanka - Mount Pidurutalagala
Nepal - Mount Everest