Step 1: Understanding the Question:
Sustainability is based on a specific "triple bottom line" model. The question asks to identify which factor is *not* one of those three primary pillars.
Step 2: Detailed Explanation:
• The Three Pillars of Sustainability:
- Environment (C): Conserving nature and the wildlife.
- Social (A): Ensuring the tourism benefits local communities and respects their culture.
- Economic (B): Ensuring the activity is profitable and provides long-term livelihoods.
• Analysis: While "Political" (D) factors like government policy certainly influence ecotourism, they are considered "external" or "governance" factors rather than the core "sustainability components" themselves.
• Conclusion: True sustainable ecotourism must be environmentally viable, socially responsible, and economically profitable. These are the three essential components.
Step 3: Final Answer:
Political is not a primary component of the sustainability model for ecotourism.