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.
Answer:
fossil fuels is the correct answer for your question
<u>Answer</u>:
<em>A break that isolates more seasoned changeable rocks from more youthful sedimentary shakes promptly above them is a sort of unconformity called a nonconformity.</em>
<u>Explanation:</u>
<em>A rebelliousness is a break that different previous (changeable rocks or volcanic rocks) from overlying sedimentary rocks.</em>
An nonconformity is a contact between two shake units where the upper unit is are commonly covered erosional surfaces that can speak to a break in the geologic that isolates a more youthful sedimentary shake unit from a molten meddlesome <em>shake or shake at the surface before it was at long last covered by the more youthful shakes above it.</em>
