I think its the economy.
Please tell me if I'm wrong, and good luck!
At that time, the fact that they were able to build such great buildings out of heavy stone showed that they were capable of building other things, such as weapons, that scared off potential enemies.
The population of Iceland is very homogeneous; it is almost entirely of Nordic and Celtic origin. In the beginning of the 1940s, a large-scale migration movement took place to the cities and towns of the coast. 93% of Icelanders now live in cities. The island has a population (according to estimates for 2015) of 330,823 inhabitants and a population density of 3 hab / km².
The most important cities are Akureyri (16,308 inhabitants), a fishing and industrial center on the north coast and the largest urban area outside the southwest; Kópavogur (25,803 inhabitants), Hafnarfjördur (22,000 inhabitants) and Keflavík (7,637 inhabitants), all of them on the southwest coast near Reykjavík; Vestmannaeyjar (4,640 inhabitants), on the tiny island of Heimaey, off the southern coast, and Selfoss (4,321 inhabitants), in the southern lowlands, is the main center for the agricultural region and the largest inland community in Iceland "Iceland". 70% of the total population is concentrated in the south of the island, due to the bad weather conditions of the rest of the island, besides the center of it is not suitable for cultivation.
Answer:
a. the unitary system
Explanation:
wikipedia defines the unitary system as:
"A unitary state is a state governed as a single power in which <u>the central government is ultimately supreme</u>. The central government may create administrative divisions. Such units exercise <u>only the powers that the central government chooses to delegate</u>."