Final answer:
Gamma radiation is highly penetrating and can easily pass through the body and various materials, being effectively shielded only by dense substances like lead.
Step-by-step explanation:
Gamma radiation is the type of radiation that is very penetrating and can easily pass through the body and solid materials. Different types of radiation have varying abilities to penetrate materials.
For example, alpha particles can be blocked by just a sheet or two of paper or the top layer of skin cells, while beta particles can pass through a hand or a thin layer of material like paper or wood but are stopped by a thin layer of metal. However, gamma rays can penetrate a thick layer of most materials, including several feet of concrete, and it takes dense materials with a high atomic number, like lead, to effectively shield against them.