Just some terminology before the actual question so you understand what "predicate nominative" really means.
Subject: Discussing the one who does something or is something in the sentence.
Predicate: Discussing the action which the subject does in the sentence.
In this sentence:
Subject: Chess
Predicate: has always been one of Henry's favorite board games.
Nominative: Describing the subject (words following <em>to be, to seem, </em>etc.)
Accusative: Taking a direct object (such as <em>to have, to see, to tell, </em>etc.)
Dative: Taking an indirect object (such as <em>to go <u>to</u>, </em><em>to look <u>at</u>, </em><em>to say <u>to</u>, </em>etc.)
Genitive: Possessing sth. (<em>Henry's, his, of the United States, </em>etc.)
<em>*note that nominative uses linking words and accusative/dative use action verbs.</em>
If you look in the sentence we have here, <em>been</em> is a paste tense of <em>to be</em>.
It is describing the subject as being one of Henry's favorite board games, and is thus using the nominative.
However, the term predicate nominative is a bit more specific than that, it's not referring to that entire phrase. It is just the object of that predicate, what the subject is being renamed to. Usually you can substitute <em /><em>equal</em><em>s</em> in the sentence and it should still work.
In this sentence, the predicate nominative is <u>games</u>. (Chess = game)
Answer:
Option 2
Unlike most species of birds, brood parasites such as the cuckoo don't provide any parental care.
It means the "Junior Reserve Officer Training Corps", by the US Armed Forces.
