The sun: This is likely the most essential requirement for every living creature, since it is the wellspring of all vitality. It additionally gives warmth to plants and creatures.
The water: Water is additionally a living domain for some plants and creatures.
The air: Air is comprised of a few gasses, however the two most essential gasses are Oxygen and Carbon dioxide. With the absense oxygen, creatures will bite the dust, and without carbon dioxide, plants can't grow, reproduce and would eventually die.
Nourishment (supplements): Living things need vitality for capacity. Vitality is expected to help organisms develop, make young ones etc. Consider what will happen in the event that you stayed for three days without nourishment…?
An Environment with the adequate weather: Excessively frosty or excessively hot? Each living life form needs the perfect temperature to survive either ashore or in water.