Answer:
This is a shape and a symbol that we literally cannot live without. What is it?
A squiggly line tells you when you've done it wrong
Sheets of paper that tell new stories each day.
It makes me warm and secure.
Very helpful if you intend to go gently down a river.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.