Answer:
Many oil rich nations in the middle east must import fresh water this is due to the reason that all the natural resources are not present in a particular region. Each region as different degree of natural resources . Hence places with oil mines have spares water resources and hence need to import water instead of oil.
Conformal maps! It is a transformation that preserves local angles.
The answer may be B, but i may be incorrect.
One positive effect of devolution is that it helps maintain a cohesive state. This means that it helps the state remained unified.