Explanation:

- Tharu

- The Tharu tribe is indigenous to the Terai region of Nepal and northern India.

- They traditionally practice agriculture as their main occupation.

- They are well-known for their expertise in cultivation and farming skills.

- Answer: This is the correct choice.

- Chenchu

- The Chenchu are a tribal community in India primarily residing in the forests of Andhra Pradesh and Telangana.

- They are traditionally hunter-gatherers, not primarily cultivators.

- Irula

- Irula people are from the southern part of India, especially Tamil Nadu and Kerala.

- Their traditional occupations include snake and rat catching, and they engage in some small-scale farming, but it's not their primary skill.

- Onge

- The Onge are one of the indigenous peoples of the Andaman Islands in India.

- They traditionally rely on hunting and gathering, not agriculture.