Yes, it is. That is why it is called "a dependent clause." It is dependent upon the independent clause.

Dependent clause is one that is dependent on other part. Independent clause always works alone by itself.

A clause that does not make sense without the presence of another clause is called a dependent clause.

Another term for a dependent clause is a subordinate clause. It is a clause that cannot stand alone as a complete sentence and is dependent on another clause to provide context and meaning.

No, a comma is not used to separate a dependent clause and a verb. Instead, a comma is used to separate the dependent clause from the independent clause.