Answer:
What type of house weighs the least?
I occur twice in eternity. And I'm always within sight.
It is something you make after you've weighed your options.
I have joy in bringing two together, but darning my existence! My life hangs by a thread, filled with ups, downs and resistance!
If you drive on this, pedestrians and the police will be pretty upset with you.
What is lighter than what it is made of?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?