Part C:
Firstly, man polluted the river by throwing plastic bottles into the lakes. When the marine creatures in the lake sees the waste, they will just consume it not realising how harmful they are. This will cause the animals to be poisoned and therefore leads to the death of the animals. This plays apart in the decreasing number of biodiversity.

Secondly, man cut down trees and as this process is ongoing, the habitats of many animals are now destroyed. the animals are either squashed by the tree or do not have a place to stay and therefore, still results in death. This plays a LARGE part in the depleting number of biodiversity, many animals are now dying because of  this.