Road construction and maintenance, water and sewage treatment, and stores that meet local needs are all elements of the ____ needed to sustain tourism in an area.

Infrastructure is indeed the correct answer because it encompasses the fundamental facilities and systems that support the functionality and sustainability of tourism in any given area. This includes not just roads and highways for transportation, which ensure accessibility to attractions and amenities, but also utilities such as water and sewage treatment that are essential for maintaining public health and comfort. Additionally, the presence of local stores helps to meet the everyday needs of both residents and visitors, further enhancing the tourism experience.

Effective infrastructure is critical because it provides the necessary support for tourism operations. Without well-maintained roads, adequate sanitation, and local services, an area may struggle to attract and retain tourists, making infrastructure a vital component of a sustainable tourism model. This interrelation demonstrates how essential infrastructure is to the overall appeal and functionality of a tourism destination.