Eco-tourism refers to tourism that is focused on the natural environment, with an emphasis on conservation and minimizing environmental impact. It encourages visitors to experience nature responsibly.
- Adventure tourism involves activities such as trekking or climbing but does not necessarily focus on environmental conservation.
- Cultural tourism is based on the cultural experiences of a destination, not specifically on the natural environment.
- Urban tourism involves visiting cities and exploring urban environments, not natural or environmental-based tourism.
Thus, the correct answer is Eco-tourism.