What type of deterioration occurs when air pollution damages the ornate details of a building?

The correct answer is that the type of deterioration that occurs when air pollution damages the ornate details of a building is classified as incurable physical deterioration. Incurable physical deterioration refers to damage that cannot be economically repaired or restored to its original condition. The effects of air pollution can lead to a gradual degradation of the materials used in the ornate details of a building, causing irreversible damage.

This deterioration is not just a superficial issue but can compromise the structural integrity and aesthetic value of the building. Since the damage caused by pollutants may be permanent and restoration might not be viable, it falls into the category of incurable.

Curable physical deterioration, in contrast, would involve issues that can be rectified through repairs or maintenance, making it a poor fit for this scenario. Economic obsolescence relates to a loss in property value due to external factors, rather than intrinsic physical damage. Conversely, functional obsolescence typically involves a loss of utility or desirability in a property due to outdated features or designs, not necessarily a result of physical damage from environmental factors. Thus, these alternatives do not apply to the specific situation described in the question.