The answer is: St. Lawrence River .
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Londoners are younger than anyone in the UK, London is more ethnically diverse than anyone in the UK, In London people are more educated (58%vs 38% graduates in working age population), In London people earn more money than the rest of the UK, London regards itself as innately naturally superior than anyone else despite having more in the way of things like violent crime than the rest of the country.
Answer:
For the countour part: Map c, contour is 50m (the lines increases/decreases with 50 meters each step). Map b, need to see the whole map to decide.
