The correct answer is option4i.e.the heat may be absorbed, reflected, and transmitted
Radiation
When we come out in the sun, we feel warm, which means that the heat from the sun reaches us.
It does not reach us by conduction or convection as there is no medium such as air in most parts of the space between the earth and the sun.
From the sun the heat comes to us by another process known as radiation
The transfer of heat by radiation does not require any medium and it can take place whether a medium is present or not
When we sit in front of a room heater, we get heat by this process; a hot utensil kept away from the flame cools down as it transfers heat to the surroundings by radiation; our body too gives heat to the surroundings and receives heat from it by radiation.
All hot bodies radiate heat and when this heat falls on some object, a part of it is reflected, a part is absorbed and a part may be transmitted