Skiathos Town, the only settlement on the island, is a bustling resort, rebuilt after severe damage in World War II.
Skiathos Town is the only settlement on the island because it is so large.
mnli hypothesis: Skiathos Town is the only settlement on the island because it is so large. premise: Skiathos Town, the only settlement on the island, is a bustling resort, rebuilt after severe damage in World War II.