Final answer:
The subject of this question is Social Studies, and it discusses LEED buildings being used intermittently.
Step-by-step explanation:
The subject of this question is Social Studies.
In the context provided, the question is discussing different types of buildings being used for various purposes. It mentions LEED buildings and refers to them as 'transients', which implies that these buildings are being used intermittently.
LEED buildings, or Leadership in Energy and Environmental Design, are structures that are designed to be environmentally friendly and energy-efficient. These buildings are certified by the United States Green Building Council (USGBC) and are built using sustainable materials and practices.