Yes it is, it has a period therefore a complete sentence.
In my opinion there isn’t, but maybe change warm to warmth in the first paragraph?
You did not type the choices therfore i cannot help you
The 'rising action' of a novel is the section of the story after the exposition that builds the story's primary (and secondary) conflicts, advancing the plot. This contrasts with 'falling action', the events that come after a story's climax, leading towards a resolution.