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.
From the given statements population have been migrating from region to region for thousands of years in Eurasia would best be classified under geography theme of region.
Answer: Option A
<u>Explanation:</u>
It is believed that there are five different themes of geography and they are location, place, human-environment interaction, movement and region. The constituents of these five themes encompass the whole subject of geography.
Human-environment interaction is defined as the study of how the humans are causing impact on the environment and how environment affects human.
It should be where the rivers separate through Nigeria
The Abyssal plains are my answer.
