Question

What are the factors in which a human being needs to survive?

Answer 1

The factors are : Shelter
Food
Oxygen
Trees(they give oxygen)

Answer 2

The factors which are needed by the human being to survive are:-
•Air
•Water
•Food

These three are very essential to survive.
We can live at least one or two days without water and food. Bug we can but live without air for one minute also. So, air is very essential to survive. Finally,shelter is also required.