In what ways are the three benelux countries similar and in water ways are the different form one another?

These small countries have much in common. Their lands are low, flat, and densely populated. Most people live in cities, work in businesses or factories, and enjoy a high standard of living. All three nations are members of the European Union. They are also parliamentary democracies with constitutional monarchs. In a parliamentary democracy, voters elect members of a lawmaking body who then choose a prime minister to head the government. In a constitutional monarchy, a king or queen is head of state, but elected officials actually run the government.