Burns can be caused by which sources?

• A. Heat, chemicals, radiation (sun included) and electricity
• B. Friction only
• C. Cold exposure
• D. Allergic reaction

Answer: (A)

Burns happen when skin tissue is damaged by energy transferred to it. The main sources of burn injuries are heat from hot objects or liquids, chemicals that react with or irritate the skin, radiation such as sunlight or other rays, and electric current that overheats tissue. This is why sunlight is included under radiation and why those four categories cover the common ways tissue damage from burns occurs. The other ideas don’t fit as burn sources: friction isn’t treated as a primary burn category here (it can cause heat from rubbing but isn’t listed as a standard burn source), cold exposure causes frostbite rather than a burn, and an allergic reaction isn’t a burn injury, though it can cause skin symptoms.