Question

Why does Coelho include the biblical allusion to Joseph?

O to show an example of how bad events (imprisonment) only got worse for
Joseph
Oto show an exampleof what Mechelzedek says, "[The mysterious force) is a force
that appears to be negative but actually shows you how to realize your Personal
Legend."
O to show off his knowledge of the Bible as a work of literature
to show how Joseph gave up and Santiago should too

Answer 1

To show an example of how bad events (imprisonment) turned out well for Joseph

Explanation: I took the test.