Answer:
is an
Explanation:
A predicate noun is a single noun or a noun phrase that renames the subject of a sentence and follows a form of the verb "to be" or another linking verb.
A subordinate clause is the one which cannot exist outside of the main, full, complete clause, it cannot exist on its own.
So, the subordinate clause in this sentence is 'that ran between two commercial buildings near the downtown area'.
Absolutely necessary; extremely important.
"it is essential to keep up-to-date records"
Answer: an invasion of a castle.
Explanation: "They enter my castle wall!"
I hope this helps :)