1) Plains are formed when everything in the land weathered or eroded away,leaving the land flat.
and
2) Another way is when volcano erupt ,and burn everything in its way,all that is left are the plains,This makes bare land or barren plains.
The most common are from dried up lakes or a glacier moving past an area.
If the US is an answer choice then the US
Both Liberia and Ethiopia has still not been colonized yet. Since Ethiopia is larger than Liberia; the correct answer to your question is Ethiopia.
plz mark brainlest
Ibadan........................
