Question

add or remove punctuation, if necessary, from the sentence below.
joe wests ghost stories which he always tells in a creepy voice are popular during camping trips.

Explanation:

The clause "which he always tells in a creepy voice" is a non-restrictive relative clause that adds extra, non-essential information about Joe West's ghost stories. Non-restrictive clauses need to be set off from the main sentence with commas. We add a comma after "stories" to start the clause and a comma after "voice" to end it, separating the extra detail from the core sentence.

Answer:

Joe West's ghost stories, which he always tells in a creepy voice, are popular during camping trips.