Correct Option: D. Duties and Obligation Explanation of the Correct Answer: The defense of a country's territorial integrity by its people is fundamentally linked to the concept of duties and obligations. This idea encompasses the responsibilities that citizens have towards their nation, particularly in times of conflict or threat. Here’s a detailed breakdown of why this is the correct answer:

1. Understanding Territorial Integrity:
2. Territorial integrity refers to the right of a state to defend its borders and maintain its sovereignty. This means that the people of a country have a responsibility to protect their land from external threats.
3. Duties and Obligations:
4. Citizens have a duty to support their country, which includes defending it against invasions or attacks. This is often enshrined in national laws and constitutions, which may require citizens to serve in the military or participate in civil defense efforts.
5. The concept of duties and obligations emphasizes that individuals are not just passive members of a society; they have active roles to play in ensuring the safety and security of their nation.
6. Civic Responsibility:
7. Civic responsibility is a key aspect of being a citizen. It includes not only voting and participating in governance but also defending the nation when necessary. This is a moral and ethical obligation that citizens feel towards their homeland.

Why the Other Options are Incorrect or Weaker: A. Political Participation: - While political participation involves engaging in the political process (like voting, campaigning, or running for office), it does not specifically address the defense of territorial integrity. Political participation is more about influencing governance rather than the direct defense of the nation. B. Political Culture: - Political culture refers to the set of attitudes, beliefs, and sentiments that shape the political behavior of a society. Although a strong political culture can foster a sense of duty among citizens, it does not directly relate to the act of defending territorial integrity. It is more about the underlying values and norms rather than the specific actions taken in defense of the country. C. Self Determination: - Self-determination is the principle that a group of people has the right to determine their own political status and pursue their economic, social, and cultural development. While it is an important concept in international law and human rights, it does not specifically pertain to the defense of a nation's territory. Instead, it focuses on the rights of peoples to govern themselves, which is a different aspect of civic engagement. Summary of Key Points:

• The defense of territorial integrity is a duty and obligation of citizens towards their country.
• Citizens are expected to actively participate in protecting their nation, especially in times of conflict.
• Other options like political participation, political culture, and self-determination do not directly address the specific responsibility of defending territorial integrity.
• Understanding civic duties is crucial for fostering a sense of national pride and responsibility among citizens.

This comprehensive understanding of civic duties helps reinforce the importance of active citizenship in maintaining a nation's sovereignty and security.