What is the one thing you cant do without?

Oh..Thats for students living in Mumbai
mumbai rockzz......
Students of class  5 to 9 can particiapte in it..They have to write an essay on this topic..But I gave answer of Basic necessities... We don't have to write of basic necessities :P... top 50 students will be awarded cash award of Rs.50,000...... (U convert it)
Yea..We r Mumbaikars! 


We cannot live without five important things--Air,water,food,clothing and shelter.They are necessary for survival and we can't do without them.Water is necessary as we cannot be thirsty all the time.Air is necessary for breathing.Food is necessary so as to get energy to survive.Clothing is necessary to protect us from various climatic conditions like low temperature.Similarly, Shelter is required for us to stay in otherwise we would die of those disasters.All these things are very important in our life indeed. We have been evolved so that these are our basic necessities.If we do not get any one of them, we will die.So, these are things we cannot do without.
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Just think of your life .............water , oxygen , clothes , home/shelter.....many things and they are the necessities of living in this planet....