In Act V, scene i of Romeo and Juliet , what role does Balthasar play in the catastrophe?

Balthasar arrives in Mantua and tells Romeo that Juliet has been found dead and is laid in the Capulet tomb. Romeo believes the report and decides to return to Verona, where he takes poison beside Juliet. Balthasar does not cause the missed letter or suggest buying poison; those events involve Friar John and the apothecary, respectively.

AI-written and checked against the verified answer.