Answer:
Where humans breath liquid?
What English word retains the same pronunciation, even after you take away four of its five letters?
I'm not man's best friend, I'm their enemy, I can mark your end, yet you do not see me, I am very small, but very tough, If you have me, then you have it rough.
Twigs and spheres and poles and plates. Join and bind to reason make.
Round as a button, deep as a well. If you want me to talk, you must first pull my tail.
What did the piece of wood say when he saw the screwdriver and screws approaching?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?