Plzz my question..??

Dear student,
Please find below the answer:

The correct option is (2).

Organic farming is the farming that excludes the practices which involve the use of fertilizers, pesticides, etc. This type of farming involves the practices such as crop rotation, composting, manuring, etc. An organic farmer creates a system of checks and balances where pests are kept at a manageable level. 

Hope this clears your doubt.
Regards.