A noun is a person, place or thing if that helps.
4. All of the Above. A good summary should have details.
It created Gothic literature.
“About Mars” is the Adjective Phrase.
Adjective phrase describes “what kind of which ones”
So for example here
“After school, I looked for books about Mars.”
“About Mars” describes the kind of books so that makes it an Adjective phrase.
I hope this helps.
