Why was elizabeth 1 right to be suspicious of Mary queen of Scots?

Elizabeth I was right to be suspicious of Mary, Queen of Scots, due to Mary’s strong claim to the English throne, which posed a direct threat to Elizabeth's rule. Furthermore, Mary was a Catholic figurehead, rallying support from Catholic factions in England and abroad who sought to dethrone Elizabeth, a Protestant. Additionally, Mary's involvement in various plots, such as the Babington Plot, demonstrated her willingness to engage in conspiracies against Elizabeth, reinforcing Elizabeth's fears for her own safety and the stability of her reign.