A major difference between the ottoman and byzantine empire during this time was mostly like the fact that they had fundamentally different religions so the correct answer is each empire practiced a different religious faith have a nice day
Roman Empire
The Fall of the Western Roman Empire (also called Fall of the Roman Empire or Fall of Rome) was the process of decline in the Western Roman Empire in which the Empire failed to enforce its rule, and its vast territory was divided into several successor polities.
Invasions by Barbarian tribes
The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s “barbarian” groups like the Goths had encroached beyond the Empire's borders
The answer would be the leather product industry. During the period of 1879 to 1909, there was a rise in less expensive products overall. So it happened to the iron and steel industry which rose because it had just become cheaper to manufacture at high quantities; but what increased its presence in the economic field, was the cotton industry, that was rising quickly, which made the leather products, that were more costly and time-consuming to manufacture to fall three rankings from 1879 to 1909.