A push factor is something that _bad __people away.
And push factor is bad things in economic is less money ,in environment is natural disasters,in social is bad rights,war and bad politic.
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.
Sugar and salt. Substances that do not dissolve in water are called insoluble.
