Genesys Cloud - Main

Good afternoon Community:

I appreciate your help with this questions, based on the PureCloud Conversations model of this reference: https://developer.mypurecloud.com/api/rest/v2/conversations/overview.html

What is the purpose, meaninig and role of the sessions and how they interact with the entities presented in that conversation model?
What is the purpose, meaninig and role of the segments and how they interact with the entities presented in that conversation model?
What is the purpose, meaninig and role of the media channels and how they interact with the entities presented in that conversation model? A conversation could have multiple media channels but every MediaChannel is a conversation? How it works?
In the conceptual model, how the wrapupcodes play they role? Can a conversation have multiple wrapupcodes in what cases and when we can retreive every of these wrapupcodes of a single conversation torought the API?
When we transfer a call, the conversation maintains two different pairs of participant IDs, this happens due to and because of every represents a segment or session of the initial conversation? Or a transfer represents a new conversation in that model?

Thanks for all.