A woman standing and watching the stars on a cool, calm night will lose most of her body heat by radiation. so correct option is A
The emission or transmission of energy as waves or particles across space or a material medium is known as radiation. Thermal radiation will cause the majority of the woman's heat to escape from her body. Evaporation is not a actual process because evaporation is a cooling process rather than a means of heat transfer since latent heat is lost during the process There will be little convection and conduction in this situation.
