Awnser: He takes Paris into Juliet's tomb and then drinks the poison. When Juliet awakes, she finds Romeo dead after which she too stabs herself with a dagger.
At first, he warns that person to leave him alone and go away from the tomb so that he will do whatever he is planning. But then when he refuses, he challenges him to a fight.
Explanation:
Romeo had gone to be united with his wife Juliet in her tomb. Once there, he told his servant Balthazar to go home and then decided to kill himself. But when he hears that someone is also there in the tomb, he warns him off and told him to leave him alone and run away from that place. But, the other man, Paris who till now is yet unidentified by Romeo, told him he is staying, Romeo challenged him to a fight. Paris died and then Romeo came to realize it is indeed Paris, the husband to be of his own wife Juliet. then he takes the poison and drank it, killing himself in the same tomb where all three of them lie.
