in romeo and juliet why is romeo banished

because he loves a capulet

because he causes tybalts death

because he causes mer curios death

becuase he is caught with juilet

Romeo is banished because he kills Tybalt, Juliet's cousin, in a fit of anger and revenge for Tybalt killing Mercutio, Romeo's friend. This act of violence leads to Prince Escalus, the ruler of Verona, banishing Romeo from the city as punishment for his actions.