The talk based on this ppt can be heard here:
https://www.thespiritualscientist.com/2019/02/why-did-rama-banish-sita/
The speaker, Chaitanya Charan, is a monk, mentor and spiritual author. He has written 20 books and writes the world's only daily blog on the timeless spiritual class, Bhagavad-gita, at gitadaily.com
5. Sacrifice
•Didn’t remarry & replace
Sita
•Considered Sita pure
enough to have her golden
effigy with him in yajnas
•Example for culture of
nepotism