How does the first scene of act I develop the conditions that will influence the ill-fated love between Romeo and Juliet?

The play Romeo and Juliet opens with a fight scene between the servants of the Montagues and Capulets. The purpose of this scene is to demonstrate how deep the hatred goes between the families. It's not just blood relatives fighting but any member of the household and its staff. Even the governing body of Verona, Prince Escalus, has trouble controlling the feud. By starting with their "new mutiny" that fuels the "ancient grudge", it develops the obstacle that Romeo and Juliet must overcome if they want to be together.

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.