Neither North or South Korea are monarchies.
The order of succession to the British throne is determined by descent, legitimacy, and religion. The current line follows the rules set by the Act of Settlement 1701 and the Succession to the Crown Act 2013, which removed male preference in the line of succession. The first in line is the monarch's eldest child, followed by their children, then their siblings and their children. For a female to become queen, she must be the reigning monarch or the next in line.
"Ascended to the throne" refers to the process by which an individual becomes the reigning monarch of a kingdom or empire. This typically occurs after the death or abdication of the previous monarch, or through a predetermined line of succession. The new monarch often takes on the responsibilities and ceremonial duties associated with royalty, symbolizing continuity and stability for the nation.
If they are related to any part of the Royal family when they are born, they go into the Line of Succession. If a girl is in the Line of Succession and a baby boy is born, he automatically goes in front of the girl in the Line of Succession. Say, if you were third in the line of succession, there is a reasonable chance you could become a monarch, but if the monarch has children, the children will automatically go to the top of the list.
He married a Roman Catholic, and therefore forfeited his place in the line of succession.
To become King or Queen you have to be next in line to the throne as defined by the Act of succession. To become Prime Minister you have to be a Member of Parliament and be invited by the monarch to form a government.
As of September 2021, the third in line of succession to the British throne is Prince George, son of Prince William and Catherine, Duchess of Cambridge.
As of January 2010, Her Royal Highness Princess Beatrice of York, daughter of The Duke of York, is 5th in the Line of succession for the English Throne.
Anne, Princess Royal is currently tenth in the line of succession to the British throne.
As he is the son and heir of the current monarch.
Do you mean succession to the throne in Great Britain/UK? It would take an act of Parliament to interrupt succession, or civil war. Not even an unexpected death would interrupt it; according to the law the next in line (and the list is very long indeed) instantly becomes monarch on the death of the reigning monarch. Such a death would be tragic and would cause some sadness and inconvenience, but the succession would work without a hitch. If you are talking about some other kind of succession you need to give more information in the question.
Prince William will get the throne, since he is older and therefore has a higher place in the line of succession.
Harry has not given up his right to the throne, he is currently fifth in the line of succession.