What is the purpose of Sotomayor’s speech?

to persuade listeners to agree that it is important to have more diverse judges
to instruct students on the steps needed to become a judge in modern times
to entertain the audience with stories of her childhood and how her family affected her life
to explain the history of the Supreme Court, especially of female and Hispanic judges

what is a theme?

ans: the implicit idea of a written work of literature is called a theme.

so, the only theme of "birdfoot's grampa" by joseph bruchuc is that as a human being one should always remember the value of every life on earth.

the grampa is stopping the car again and again to save those little toads from washing away in the heavy rain is an act of kindness and humanity.