Question

_________________ is considered as the basic life support system as it is the provider of basic necessities of life such as air, water, food and land

Answer 1

Answer:

Earth (astronomy)

CELSS(controlled ecology life support system)

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Answer 2

Answer:

Environment

Explanation:

Because, it provides us with rivers, from we can get water, it provides us with trees which give us oxygen to breathe and food to eat. It also provides us with land on which we can walk and live, etc.