Final answer:
Queen Elizabeth's commitment to her troops and willingness to fight alongside them for the sake of England's safety and victory.
Step-by-step explanation:
The excerpt from Queen Elizabeth's Address to the Troops at Tilbury that shares the common purpose of persuading her audience that she is willing to do what is best for England is:
I am come amongst you, as you see, at this time, not for my recreation and disport, but being resolved in the midst and heat of the battle, to live or die among you all.
In this excerpt, Queen Elizabeth is emphasizing her commitment to her troops and her willingness to fight alongside them and put her life at risk for the sake of England's safety and victory.
Learn more about Queen Elizabeth's conviction to protect England