First, I will pack some clothes!
It has to be colorful and stylish!
Second, I will pack a book what shows, where to go during the vacation!
But novels are also nice!
Finally, I will take a camera!
But I don’t have my own camera, so I will take my mom’s!
Ah! I want to go on a vacation!

“Keep testing whether you are in the faith.​” — 2 Corinthians 13:5
= 
First, I will pack some clothes!
They have to be colorful and stylish!
Second, I will pack a book that shows where to go during the vacation!
But novels are also nice!
Finally, I will take a camera!
But I don’t have my own camera, so I will take my mom’s!
Ah! I want to go on a vacation!
= Clothes is a plural noun, so we use the plural pronoun. 
= "that" is a relative pronoun, which introduces a clause that gives us more information about the book
= Fantastic job, Diane!