This reduces biodiversity.
a: agricultural intensification
b: the eu
c: traditional farming practices
d: use of chemical agents

I believe its either A) Agricultural intensification, or possibly D) Use of chemical agents. I've heard that both can cause a drop in biodiversity, but i'm not completely sure.
Hope this helps~!
~{Isle of flightless birds}

Although this may be the opposite of what you think i will say it anyway. you were brought into this world for a reason and you still have soo much ahead of you. not everybody has an opportunity of living a great life, but it doesn’t give you a reason to end everything. somebody in the world loves you, and imagine what you would do to them if you left forever.