History was a driving force behind such migration, since humans tended to move to new territory when they lacked food, shelter, or other resources--meaning that most of the conflicts throughout history have been driven by the same forces that drove migration out of Africa.
Terrestrial: Mercury, Venus, Earth, Mars
Gas: Jupiter, Saturn, Neptune, Uranus
Based on the given choices above, Lake powell is the is part of the smallest percentage of freshwater. Lake powell is a reservoir on the colorado river which is locarted along rainbow bridge of Utah. COmpare to the other choices which has a vast percentage of freshwater.