Answer:
The little pink nub that helps rectify mistakes.
You're currently trying to solve one
Securing your documents is easy with these trusty metal objects
If there are three cups of sugar and you take one away, how many do you have?
What comes with your car, but travels more than your car?
It's what light turns into in the night
Easy
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?