I need help on this one too I think it might be (b)
Answer:
China
Explanation:
The production of silk originates in China in the Neolithic (Yangshao culture, 4th millennium BC). Silk remained confined to China until the Silk Road opened at some point during the later half of the 1st millennium BC.
Answer:
they are use to make tar, asphalt, paraffin wax, and lubricating oils.
Explanation: