Final answer:
Preventive measures and biological control methods are preferred for protecting crops because they effectively control insect populations and resistance, protect surroundings, and lower costs.
Step-by-step explanation:
Preventive measures and biological control methods should be preferred for protection of crops because they are effective in controlling insect populations and insect resistance, protecting surroundings, and lowering costs. Biotechnology tools can make crop production cheaper and more manageable, such as engineering crops to tolerate specific herbicides for weed control.
Biological control, such as using beneficial insects, cultivated predators, and natural or non-toxic pest control products, can reduce the damage caused by pests below economically significant values. Additionally, biocontrol promotes plant interactions and can be used in public health for vector control. These measures are safer, sustainable, and contribute to organic farming systems.