Answer:
persuade the troops that this cause is so worthy that she is willing to sacrifice her own life.
Step-by-step explanation:
Queen Elizabeth's address to the troops at Tilbury was to try to motivate them and convince them that the cause they are fighting for is a noble one that even she is willing to lay down her own life.
She tells them that she is in their midst "not for recreation" but to "live and die" with them and to "lay down" her life for God, her kingdom and honor.
She shows that she so believes in the cause that she is ready to die for it and trying to persuade the troops to join her.