Question

have you noticed any activity which leads to the loss of biodiversity around you

Answer 1

Yes, I hv noticed activities which leads to the loss of biodiversity.
Some are -
1 - Deforestation
2 - Throwing of wastes into river 
3 - Killing animals and hunting for them
4 - Factories leaving smokes

Answer 2

activity which leads to the loss of biodiversity around are
1 cutting trees
2 pollution
3 Throwing wastes into river 
4 setting up of industries