What is a potential hazard of having inadequate ventilation in a tight building?

Inadequate ventilation in a tight building can lead to increased indoor air pollution, which is why this answer is correct. When ventilation is insufficient, contaminants such as volatile organic compounds (VOCs), carbon dioxide, dust, and various indoor pollutants can accumulate in the air. This accumulation can adversely affect the overall air quality, leading to health issues for the occupants, such as respiratory problems, headaches, and other symptoms associated with poor indoor air quality.

Maintaining proper ventilation is crucial for allowing fresh air to enter and circulate within the space, diluting and removing harmful substances. An environment with adequate airflow can help reduce the concentration of these pollutants and promote a healthier living space.

Other options may also reflect concerns associated with inadequate ventilation, but in this context, the primary issue directly connected to the lack of airflow is the potential buildup of indoor pollutants.