Question

I am something. Everybody has me. Some had more of me while some had less of me. Sometimes, humans just need more of me, but sometimes its the straight opposite (Isn't it interesting?!) I am there in all spheres of life and the world itself depends on me. You cannot do anything without me. Without me humans won't exist! Leave humans, nothing else will (like animals).

Answer 1

Answer:

A tree

Explanation:

without tree human cannot exist and animals also