Final answer:
A subordinate/dependent clause cannot stand alone as a complete sentence and depends on an independent clause. In the given example, "When the sun sets" is a subordinate/dependent clause.
Step-by-step explanation:
"When the sun sets" is an example of a subordinate/dependent clause. A subordinate/dependent clause is a group of words that depends on an independent clause to make sense. It cannot stand alone as a complete sentence. In this case, the clause "When the sun sets" cannot stand alone and needs to be connected to an independent clause like "I feel calm."
Learn more about Subordinate/dependent clauses