What type of clause is shown in parentheses until the storm began?

The clause "(until the storm began)" is a subordinate clause, specifically an adverbial clause of time.

Here's why:

* Subordinate clause: It cannot stand alone as a complete sentence and depends on the main clause for its meaning.

* Adverbial clause: It modifies the verb in the main clause (often indicating time, place, manner, reason, etc.)

* Time: It tells us when the main clause's action occurred (until the storm began).

Let me know if you'd like more examples or have any other questions!