Final answer:
Free radicals can damage various parts of the body, but the skin is specifically susceptible to free radical damage caused by environmental factors such as UV-A light exposure.
Step-by-step explanation:
Free radical damage occurs throughout the body as these highly reactive molecules contain unpaired electrons that can oxidize other molecules, causing cellular damage. While free radicals can potentially affect any part of the body, they are most commonly associated with skin damage, particularly as a result of UV-A light exposure which leads to indirect DNA damage. Antioxidants like vitamins C and E, as well as ß-carotene (a provitamin), can neutralize free radicals and protect the body by either stopping chain reactions or by being less reactive and easily excreted.
The skin is continuously exposed to environmental factors such as radiation and pollution that can create free radicals. It's important to note that while free radicals can damage various parts of the body, the question seems to be specifically asking about the damage they can cause that is directly linked to an environmental factor like UV-A light, which points to the skin as the primary target in this context.