Improvement in Food Resources — Question 1

Preventive measures and biological control methods should be preferred for protecting crops because

1. Biological control of weeds and insects occurs naturally in nature if we do not use chemicals like herbicide and insecticide.
2. They do not cause any pollution and ecological disturbance as done by chemicals.
3. This also helps to minimize bio-magnification.
4. Insects and weeds slowly adapt or mutate to become stronger and immune to chemicals.