The similarity between all of them is that they all happened sometime in the 1920s.
Because they were close to the sea, no part of Britain was very far from the sea. This was quite advantageous because water transportation was the only economic way to move bulky materials like iron.
The answer is Command Economy. This kind of economic system
helps hold the economic price, command economic system to adapt to a natural
disaster because the need for various products cannot be predicted easily before
a disaster occurs. The people in the affected areas suffer from shortages of
basic necessities, and the government may not be able to fill in the gaps
because it plans production years in advance of actual production.
The answer is Executive.
Apparently I need 20 characters so this is just junk
Spread of communism is the answer
