I believe the answer is basal sliding
Separate Layer it's part of the "Atmosphere layers"
Europeans still ship goods using canals and rivers because it is cheaper than using other shiping methods
A person who has been forced to leave their country in order to escape war, persecution, or natural disaster. Hope that helps!
Answer: Most likely B, Cost and time.
If I was transporting goods, I wouldn't want to pay more than I need to.
Hope this helped.