Final answer:
The legislation that Elizabeth I passed in 1559 to make the monarch the head of the Church of England again was called the Act of Supremacy 1559.
Step-by-step explanation:
The legislation that Elizabeth I passed in 1559 to make the monarch the head of the Church of England again was called the Act of Supremacy 1559. This act, similar to one passed by her father Henry VIII, restored England to the Protestant faith after her sister Mary I had restored Catholicism during her reign. The Act of Supremacy 1559 solidified Elizabeth's authority over the Church of England and brought stability to the country.