Need more info. Not being specific
We can't see underlining here, but here, I think this will be helpful:
"I read a novel" would be the intependent clause: it does not need the other one to be complete.
"until the guests arrived" is the subordinate clause: it needs the independent, main clause to be complete.
Answer:
I don't know what the question is, but I agree with the statement.
Explanation:
