The criteria for specifying STs include:

The correct answer is: All of the above.

The criteria for specifying Scheduled Tribes (STs) include:

• Primitive traits: This refers to the way of life of the STs, which is often characterized by a lack of contact with the outside world, a subsistence economy, and a strong sense of community.
• Geographical isolation: STs are often found in remote areas, which can make it difficult for them to access education, healthcare, and other essential services.
• Backwardness: STs are often economically and socially disadvantaged, which can make it difficult for them to participate in mainstream society.

The Indian government has a number of policies in place to promote the development of STs, including affirmative action programs in education and employment.