Teapot Riddle no.43
Rules
I have one word which has several (2 or more) meanings
Each of the meanings is a teapot (first, second ...)
Try to figure out the word with my hints.
today less hints than usual
First Hint:
My first teapot is elemental to survive
My second teapot isn't elemental to survive
My third teapot helps to survive
My fourth teapot helps the third teapot
Second and last Hint:
My first teapot is a basic market principle
My second teapot is a basic presentation principle
My third teapot is a general principle
My fourth teapot comes from the principal
Good luck and have fun :)
last riddle
and probz to Shahriar Mahmud Sajid for making it