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.
It was possible because it helped him navigate in territories that were completely unknown to him. Thanks to it, he could determine where his ship was based on the position of the sun and the time of the day and he used this to navigate all the way to India.
Just reread the text I'm sure you can find it in there. You are probably over thinking it. I know this isn't the awnsr you wanted bit you should do a bother activity to clear your mind and try again later☺
Answer:
20,000- to 25,000-hour mark
Explanation: