Oil is one of Saudi Arabia's major exports.
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.
I’m going to guess urbanization but i could be wrong!
Europeans wanted mineral resources! Hopes this helps
Montana had the lowest proportion of 19.6 residents obese in 2013