Answer:
A recurring theme: Love.
The work: Romeo
and Juli et.
Step-by-step explanation:
The theme in a work is the main idea of this text. Each work can have more than one theme, and generally it does. These themes are usually universal like death, love, violence, etc.
In this case we choose one of the themes of this work which is love. We can see how two young lovers face the hatred that their families feel in order to be together, even if this leads to a tragic end.
They both loved each other unconditionally. So much so, that they can not bear the fact of a life where the other does not exist, and that is why they end up killing themselves.