what is entrophication? is this a correct word .?? if it is so plzz give me ans. fast.!! and if not then tell me correct word and answer too...!!

Eutrophication is the presence of excess nutrients in water bodies. Release of nutrient rich sewage and industrial effluents lead to introduction of nutrients such as nitrogen and phosphorus in the water body. This leads to the increase in temperature and Biological Oxygen Demand of the water body, causing increased biological activity, thereby leading to algal blooms.

@Deepak: Good work! Keep it up.