Explanation: Adjective/Relative clauses are a group of words starting with a pronoun (that, which, who, whom, where, when, why, whose) that describes a noun.
Let's look at these two sentences:
Honolulu has a vibrant tourist driven economy. Honolulu was my hometown.
The first sentence has the main idea that we want to express. The second sentence gives extra information about the subject, Honolulu.
We can include that extra sentence in the first sentence:
Honolulu, which was my hometown, has a vibrant tourist driven economy.
Other relative pronouns:
A man who was seen earlier near the café…
A boy whom Sara ran into yesterday…
a country that has only
A house where there was a murder…
The man whose broken-down car sits in the driveway...