Islamic culture. if it is what you're looking for.
South is downstream
Hope this helps
Physical erosion and chemical erosion
I'm not sure its correct the two might be considered the same
Some countries that span both Europe and Asia include Turkey, Russia and Kazakhstan. They are called trans continental countries. Even though Europe and Asia are continents in their own rites, geographically speaking they span one landmass known as Eurasia. The landmass rests on the tectonic plate known as the Eurasian plate.
The answer is either a or b. I am pretty sure it is north. Hope this helps!!