Bio means life and then diversity means variety. Hence the word biodiversity is defined as the wide variety of life on earth.our planet-earth contains more than twenty million species of organisms. It is very huge amount and only in that twenty million 1.4 million species have been identified so far.this millions o species differ from one another.
Difference held between them not only on its appearance,also an its nature,behaviour and all associated with it.So this type of variation among the living organisms are called as biodiversity.it also protects the land,air and water.
Loss of this will have a serious effect on economic and social costs of all.