A. Habitat loss Because by farming the land, species living within the environment loose areas to live in which decreases biodiversity.
B. Eutrophication Because when using lots of fertilizer, it will eventually lead to run off during rain and the fertilizer will end up in the lakes which affects the biodiversity there. And to define eutrophication, it's basically just the increase of nutrients in lakes or a body of water. This can lead to overgrowth of aquatic plants and they will take up more oxygen and release carbon dioxide which will end up suffocating the aquatic animals living within the water