Which of the following groups took control of roman lands as the western roman empire collapsed? ottoman turks mongols arab tribes germanic tribes

   Germanic tribes

Explanation:  The fact that the fall of the Western Roman Empire occurred when Germanic Prince Odovacar defeated the Roman Emperor in 476 AD and subordinated the Roman army suggests that the Germanic tribes took control of the Western Roman Empire. These were numerous Germanic tribes from Western and Northern Europe, the most famous of them being the Goths, who left a large mark on the later period in Italy.

a. competition with other nations.