Final answer:
Without explicit context from the given text, a definitive answer as to why Allen cannot marry his love isn't possible. However, common reasons in such stories include issues related to social class or authority-imposed restrictions.
Step-by-step explanation:
In the story of Robin Hood, the reason given by the Bishop for why Allen cannot marry his love is not explicitly stated in the provided texts. However, historically and within many Robin Hood tales, common reasons for such an obstacle often include issues of social class or forbidden love.
Without explicit context from the given text, a definitive answer as to why Allen cannot marry his love isn't possible. However, common reasons in such stories include issues related to social class or authority-imposed restrictions.
For example, if Allen were a commoner or not of noble birth, which is typical in such narratives, these factors might prevent him from marrying someone of a higher social standing.
In other stories, love can be forbidden by authority, such as a king or other ruling figure. Without more context from the specific Robin Hood story being referenced, it is difficult to provide a definitive answer.