List some local factors that can affect wound healing.

The correct answer identifies key local factors that influence the wound healing process. Infection is a significant barrier to healing because it can cause further tissue damage and prolong inflammation. Moisture balance is also crucial; wounds that are too dry or excessively moist can hinder the healing process, as moisture can maintain a suitable environment for cellular activity while preventing crusting over. Perfusion, or the flow of blood to the wound site, is essential because it delivers oxygen and nutrients that are necessary for tissue repair. Tension refers to the forces acting on the wound edges; excessive tension can lead to wound dehiscence or poor closure, adversely affecting healing.

In contrast, the other options include factors that either do not directly impact wound healing or are more general health considerations. Sun exposure and air quality may influence skin health but are not localized factors affecting a specific wound. Similarly, while age can affect healing at a systemic level, it is not a local factor that affects a specific wound's healing environment in the same way that infection or moisture does. Therefore, the first option encapsulates the most relevant factors affecting the local wound healing process.