Water, oxygen, and food
Three basic necessities that are essential to human survival are food, shelter and water
necessities are things that are needed for something. like humans need water to survive. therefore, water is a necessity to human survival
those basic necessities are the earth's environment, for the human civilization to survive and continue in absence of this planet that same environment have to be recreated. I'm not talking here about saving trees and extinct animals. Without wishing to appear facetious I will attempt to answer the question as I see it:-One man plus one woman, capable of procreation, are the basic necessities for the survival of the human civilisation...
Survival, everything else is secondary.
Humanity.
because humons need to look after the earth
Surviving on Earth involves accessing essential resources such as air, water, food, and shelter. Humans and many other organisms rely on the planet's ecosystems to provide these necessities. Additionally, social structures and technology have evolved to enhance survival by improving access to resources and creating systems for cooperation and support. Ultimately, it is the balance of natural processes and human ingenuity that enables survival.
The main necessities to make a peanut butter and jelly sandwich are bread, peanut butter, jelly, and a knife.
Some of Earth's resources are both limited and necessary for human survival
Ozone is vital for human survival. Without it, sun's rays would destroy human race.
Ozone is vital for human survival. Without it, sun's rays would destroy human race.
Water cycle brings water to earth's surface. it is important for human's survival.