It decreases the population of certain animals
A
B
AB
O
unless you're asking for specifics, like O+ and such, but I think you just wanted the main four, so there you go. hope this helps, but I may be wrong ^^
Answer:
Sustainable Crop Intensification
Explanation:
I don't know why this is the answer, but it is the correct one on edge, so... Quit deleting my comments, Brainly.
20.
They told me that my answer was too short so I'm just adding this on, don't mind me.
