Here's why:
* Predicate: The predicate is the part of the sentence that tells us what the subject does or is.
* Simple Predicate: The simple predicate is the verb or verb phrase that forms the core of the predicate.
In this case, "Brianna" is the subject, and "needed kindling for a fire" is the predicate. The verb "needed" is the simple predicate because it tells us the action Brianna performed.