Answer:
I am needed for most animals and hardcover books. What am I?
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word. What am I?
I transfer oxygen from the atmosphere to your blood
You do not want me when you donβt have me, but when you have me you donβt want to lose me. What am I?
My second is performed by my first. A thief by the marks of my whole might be caught. What am I?
If all Wibbles are Criggles, all Borkins are Kwumblins, no Hoggles are Borkins, and all Criggles are Borkins, is it true that all Borkins are Criggles?