Answer:
1
Explanation:
The rest are wrong b/c it helped <em>expand</em> China rather than isolate it, they didn't use ships on the Silk Road, and it brought better communications, etc. between countries.
Usually it forms or consist of fog
Answer:
The answer would be D, Both developed and developing countries have had significant negative impacts on the environment
Explanation:
Answer:
Tundra ecosystems are treeless regions found in the Arctic and on the tops of mountains, where the climate is cold and windy
Explanation:
