Which surface type is identified as a lead hazard due to chewing or mouthing?

The correct answer is painted wood furniture, as it is particularly significant when it comes to lead hazards associated with children who may chew or mouth surfaces. Lead-based paints, commonly used in homes built before 1978, can deteriorate and create dust or chips that are easily accessible to children. Painted wood furniture presents a risk because children often manipulate these surfaces with their mouths due to curiosity, leading to potential lead exposure.

In this context, while textured wallpaper can also contain lead, it is less likely to be chewed on or mouthed compared to furniture surfaces where children frequently play or interact closely. Friction surfaces, such as door hinges or windows, are more related to wear and tear leading to lead dust but do not pose the same direct risk of ingestion through mouthing. Metal surfaces typically do not contain lead in the same way painted items do and are thus considered less hazardous in this scenario. Understanding these distinctions is crucial for identifying and mitigating lead exposure risks in environments frequented by children.