“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.
I THINK ITS TRUE BECAUSE I JUST THINK SO AND I DONT EVEN KNOW WHAT THAT QUESTION EVEN MEANS
