The fundamental duty of every Indian citizen includes:

The correct answer is: All of the above.

The fundamental duties of Indian citizens are enshrined in Article 51A of the Indian Constitution. These duties are as follows:

1. To abide by the Constitution and respect its ideals and institutions, the National Flag and the National Anthem.
2. To cherish and follow the noble ideals which inspired our national struggle for freedom.
3. To uphold and protect the sovereignty, unity and integrity of India.
4. To defend the country and render national service when called upon to do so.
5. To promote harmony and the spirit of common brotherhood amongst all the people of India transcending religious, linguistic and regional or sectional diversities; to renounce practices derogatory to the dignity of women; and to value and preserve the rich heritage of our composite culture.
6. To protect and improve the natural environment including forests, lakes, rivers and wildlife and to have compassion for living creatures.
7. To develop scientific temper, humanism and the spirit of inquiry and reform.
8. To safeguard public property and to abjure violence.
9. To strive towards excellence in all spheres of individual and collective activity so that the nation constantly rises to higher levels of endeavour and achievement.
10. To provide opportunities for education and to promote adult education.

These duties are important because they help to promote a sense of national unity and identity. They also help to ensure that citizens are aware of their responsibilities to the country and to each other.