What is one of the hazards posed by electromagnetic radiation?

Electromagnetic radiation can pose significant hazards, particularly in terms of generating extreme heat in living tissues, which is why the selected answer is correct. When exposed to high levels of electromagnetic radiation, the energy can be absorbed by the body, leading to an increase in temperature. This phenomenon is particularly concerning in environments where employees are exposed to microwave radiation or certain types of radiofrequency fields. Prolonged exposure can result in thermal damage, which can have serious health implications.

In the context of the other options, while electromagnetic radiation does have beneficial uses, such as providing warmth (option A) and supplying energy to electronic devices (option C), these are not hazards associated with radiation in the same way that extreme heating of the human body is. Similarly, enhancing communication signals (option D) is an advantage of electromagnetic radiation but does not represent a hazard. These distinctions clarify why the focus is on the potential danger of heat generation in biological tissues when considering the risks of electromagnetic radiation.