Blanket, Comforter and Duvet Difference

What is a Comforter?
What’s the difference between a comforter and your average blanket?
What is a Duvet?
What is a Cover/Protector?
What’s in a Comforter/Duvet Set?
How to Choose the Right Size Comforter
What is a Throw or Quilted Blanket
Pillow Sizes
Pillowcase/Protector Sizes
Can I purchase just 1 item?