What type of materials poses a risk due to corrosion of living tissue or severe corrosion of materials?

Corrosives are materials that can cause severe damage to living tissues or can corrode other materials upon contact. These substances typically include acids and bases that can chemically react with organic and inorganic materials, leading to harmful effects such as burns on skin or serious damage to equipment and structures.

When exposed to corrosive agents, living tissues can experience destruction, resulting in pain and severe complications if not appropriately treated. Moreover, the corrosive capability of these substances makes them particularly hazardous in various environments, including industrial settings, laboratories, and during transportation.

In contrast, flammable solids primarily pose a risk of fire and potential explosions; radioactive materials present hazards related to radiation exposure; and poisons are harmful substances that can cause toxicity without necessarily exhibiting corrosive properties. Each of these poses their own unique risk, but only corrosives specifically relate to the corrosion of tissues and materials as described in the question.