Basically the four kinds of info that a writer must document are:
Direct quotations
Summary of a discussion
Information
Writer constructs a diagram from data provided by others
These four are essential for a writer to document. Hope this can help a lot
1. Non-essential - A title usually is the result of hard work, therefore, it's not necessary to include that appositive phrase.
2. Essential - It tells you who the Keystone Corps are. Otherwise, you would have no idea.
3. It's non essential.
The answer in detail:
basically, the spelling is 'pizza' and you spell it, 'p i z z a'.
I would say the sentence that is highlighted in blue.
“The room gives off an air of clean sparseness. The roof rafters are exposed, and the wood colors are raw and unmellowed”