Which of the following best describes a "shielding" method in radiation protection?

The concept of "shielding" in radiation protection specifically refers to the use of materials designed to absorb, block, or reduce the intensity of radiation as it travels through space. Shielding effectively reduces radiation exposure to individuals by either preventing the radiation from reaching them or by significantly lowering its strength. Common materials used for shielding include lead, concrete, and specialized plastics, each chosen based on the type of radiation (e.g., gamma rays, X-rays, or beta particles) being dealt with.

The other options, while related to radiation safety, do not accurately define shielding. Increasing exposure time would actually lead to higher doses of radiation received, rather than protection. Wearing personal protective equipment is a measure to protect the individual wearing it but does not represent the concept of shielding for blocking radiation from the environment or source. Implementing area monitoring systems focuses on detecting and measuring radiation levels rather than reducing exposure through physical barriers. Therefore, the accurate definition of shielding is tied directly to the use of materials that absorb or block radiation, which is reflected in the correct choice.