Question

There were plenty of dolphin had been seen in the river Ganges but now very few are left. This is beacause: [3 MARKS]

Answer 1

Each point: 1 Mark

1. The Ganges river dolphin can only live in freshwater. In the last few decade, the level of pollution in the river Ganges has been increased in significant amount.
2. The disposal of untreated sewage, industrial wastage, traditional rituals have contiminated the water which makes the survival of dolphin difficult. Hence, they started dying.
3.The Ganges river dolphin is important because it is a reliable indicator of the health of the entire river ecosystem.