The correct answer is A. Fire
Step-by-step explanation:
Radiation is a physics concept that refers to the energy emitted or transmitted as a result of subatomic particles or electromagnetic waves by specific substances or body most common radiation sources include x-rays, electromagnetic radiation, microwaves, acoustic radiation, among others. In the case of fire, it emits radiation as it transmits energy in the form of heat waves that are the result of subatomic particles during combustion. Other objects such as ice, water or dirt do not emit energy or radiation except if these are contaminated with radioactive elements. Due to this, fire emits the most radiation as every fire implies heat waves transmitting considerable energy as a result of combustion processes.