Ice age is a period where there is expansion of glaciers and this leads to certain land forms. There were some land forms that were formed during the period of ice age due to the glaciers of that time. Great lakes were the creation of some land forms by the glaciers.
But the land form that was created due to the indirect effect of the glaciers in the ice age was the pluvial lakes. Striations, U shaped valley and cirques also are the land forms created.
Jordan is more dependent on the river because the majority of Jordan's population is located near the Jordan River, and the area surrounding the Jordan river is the only place where agricultural is sustainable in Jordan
I assume that the question refers to the political affiliation of the Islands (They are Islands in the Mariana Trench, in the Pacific Ocean, south of Japan) - they are politically linked to the US - the correct answer is a). For example the Mariana islands have a commonwealth status within the US.
