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.
Hope this helps!
Yes B because technology gets better and results in more lifespan.
Its D.the federal reserve engages in open market operation
True! I am not sure what environmental movement though.
