Petroleum products. So oil and natural gas etc.
Jewelry and precious stones come in second.
Maintains in a range are in a chain are series in a line.
The correct answer is C. In a chain or series in a line
Good luck with your studies, I hope this helps!
Europe and Asia are in the same landmass, like you can see in this picture.
You can visit Paektu Mountain, Mansudae Hill Grand Monument and lot more.
