Question

I wondered if she was free which clause is this​

Answer 1

Answer:

Independent clause..

Answer 2

The clause is adverb clause.

• The clause represents a category of terms that in a sentence or phrase acting like an adverb.  
• Adverb clauses usually add detail describing how, where, why, how often or under what circumstance the affirmative action takes place.
• Since, in the sentence the person is wondering on the other person being free.
• As the probability is being described in the sentence and if the person will be free or not makes it an adverb clause.