Basically look at the options and say them out loud. If it sounds like a full complete sentence, its a dependent clause. It can be its own sentence!
In this case, that option is B. Hope this helps!
(I would appreciate it if you helped me by making this the brainliest answer)
I think that what you are asking is which word is a subject complement in that sentence. What I think the answer to this question is the word third.
Answer:
An architect is a person who works by the acts of planning, designing, and having control/monitoring the construction of buildings.
Explanation: