Can someone give me examples of subordinate clauses in a sentence when talking about your best friend or what is a good friend? (You don't have to do the 125 words but I'd appreciate it if I could receive some help)

The essay I'm doing wants this: Use subordinate clauses to add variety and smoothness to original writing. Write a paragraph of at least 125 words demonstrating a variety of sentence types and clauses. What a good friend is.