Exposure to which of the following factors can cause crazing in transparent plastic windows?

Crazing in transparent plastic windows, such as those found in aircraft, occurs when the material develops small cracks or fissures on its surface. This phenomenon is often caused by exposure to ultraviolet light. UV radiation can break down the chemical bonds in the plastic, leading to degradation of the material and resulting in the visible surface imperfections known as crazing.

While other factors like water damage might affect the integrity of a window or lead to other types of damage, they do not specifically cause crazing in the way that UV light does. Similarly, electrical static might create surface charges but does not lead to physical cracking in plastic. Low temperatures might also affect the brittleness of a material, but it is UV light that is primarily responsible for the chemical breakdown that leads to crazing in transparent plastics.