Why was elizibeth in danger when her younger brother was king?

Elizabeth I was in danger during the reign of her half-brother, Edward VI, primarily due to the political instability and power struggles that characterized this period. As a legitimate heir of Henry VIII, she was a potential target for those who opposed the Protestant reforms associated with Edward's reign. Additionally, factions within the court, particularly those aligned with her Catholic half-sister Mary, viewed her as a threat to their ambitions, heightening the risk to her safety. These tensions ultimately made Elizabeth's position precarious until she ascended to the throne herself.