What is the predicate adjective in The silk flowers looked real to casual observer?

The predicate adjective in the sentence "The silk flowers looked real to a casual observer" is real.

Here's why:

* Predicate: The predicate is the part of the sentence that tells us something about the subject. In this sentence, the predicate is "looked real to a casual observer."

* Predicate Adjective: A predicate adjective modifies the subject and follows a linking verb. The linking verb "looked" connects the subject "The silk flowers" to the adjective "real".

Let me know if you have any other sentences you'd like to analyze!