Q:Name one thing you can not live without and why?
The one thing which I can not live without is Oxygen.Because it is the necessary element for all lives on earth. no one can survive without it. It is present in the form of gas in air or in dissolved form in water for the survival of marine life.It is used by all the organisms on earth either directly or indirecctly.
Plants uses it directly from the air for the formation of food and other organisms survival, plants are the major reservoir of oxygen because one tree can produce oxygen for 36 organisms in an area.Besides its use in respiration and food formation it has many uses in various industries and all other sides.
There is oxygen cycle by which it is produced and used regularly.The use of oxygen in respiration process evolved with the evolution of organisms from anerobic(which donot use oxygen for survival)to aerobic (which uses oxygen for survival).they begain to use oxygen for breathing purpuse and exhale oxygen. Besides all these uses it has more purpuses and uses.
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