Answer:
His family used to rule the Dwarf kingdom until the dragon came.
Step-by-step explanation:
J. R. R. Tolkien's "The Hobbit" series tells the story of "The Lord of the Rings" trilogy but from the perspective of the hobbits and dwarves. It focuses on the journey to regain the lost kingdom of Lonely Mountain, the kingdom of the Dwarves.
Thorin Oakenshield,the son of Thráin II, is also known as the King of Durin's Folk. He is also the leader of the dwarves and had been guided by Gandalf, the wizard on their attempt to reclaim the lost kingdom of Lonely Mountain from the dragon Smaug. And with the help of Bilbo Baggins, a hobbit from the Shire, the group journeyed through different lands, passing through the elves' land and other parts, to get to the Lonely Mountain where the dragon had settled and taken over.
Thus, the correct answer is the first option.