Hi there
if multipl both a) and b)
if just one then it is a)
hope this helps have a good day if u need anymore help please feel free to message me!
Answer:
Virus's,
there would be stealing too
Explanation: The silk road was one of the largest roads built for trading across countries and as they traded the virus's were spreading there was also I really bad type of virus's but I forgot the name. I think you should research about it to get more points and i think this is history related not geography. Enjoy.
Minerals can not be made of organic materials
