I think its C. global warming
because the other one directly threats aquatic bio diversity while global warming doesn't just affect aquatic biodiversity
It is the trigeminal. check my spelling though.
Answer:
4. Organic practices
4.1. Biointesive farming. ...
4.2. Crop rotation. ...
4.3. No till and conservation till farming. ...
4.4. Mulching. ...
4.5. Composting.