Answer:
1. Those Books aren't mine
2. Those pens are orange
3. These notebooks are closed
4. Those umbrellas are colorful.
5. Those coats are worn-out
6. Those radios aren't working
Because they are unique, which in turn makes the book unique.
Hope it helped,
BioTeacher101
<span> The mood is the atmosphere, or total feeling, within a literary work</span>
The answer to this one is C