Question

Which of the following geographic features most likely hindered the Byzantines from expanding north of Italy?
a major river
a sea
mountainous terrain
desert terrain

Answer 1

Here's an artistic representation of northern Italy from the Metropolitan Museum that might help you:
http://www.metmuseum.org/toah/art/hg/detail/hg_09eustn.jpg

And a general geographic map from World Atlas showing Europe:
http://www.worldatlas.com/webimage/countrys/eulnd.htm

From these two, you should be able to figure the answer out. :)