Final answer:
Henry VIII established the Church of England and annulled his marriage to Catherine of Aragon, allowing him to remarry and attempt to produce a male heir. This was done in order to ensure his desired line of succession and negate any threats from Edmund and his brother Roger.
Step-by-step explanation:
To negate the threat of Edmund and his brother Roger, Henry VIII sought to ensure the succession of his desired heirs by establishing a new Protestant church, the Church of England, with himself as its head. This radical move came after Pope Clement VII refused Henry's request for an annulment of his marriage to Catherine of Aragon, who had failed to produce a male heir. By creating the Church of England, Henry was able to annul his marriage himself, marry Anne Boleyn, and try to produce a male heir. However, Henry's marriages after Anne, including one to Jane Seymour who bore him a son, Edward, ultimately shaped the line of succession without further reference to Emond and Roger.