joe...
Simply, its a style of writing. Its a way of writing, in that its story like [hence narration]
omniscent
MonoZygotic Twins
I think it is 1st person because of the way he says "I"...
family
An outside observer narration is known as third-person point of view. This type of narration involves the narrator telling the story from an external perspective, where they are not a character in the story but rather an observer. This allows for a broader view of the events and characters.
no
narration is used in narrative
The suffix for narration is "-tion."
A narration within a narration is called a "nested narration" or a "frame narrative". This is a storytelling technique where one story is told within another story.
Yes particularly if your first set of twins are fraternal (aka non-identical twins) as these are the type of twins that are said to have a hereditary connection.