Answer: Option (a) is the correct answer.
Step-by-step explanation:
In a thermos bottle there is silver coating inside the bottle which helps in prevention of heat transfer through radiation.
Also, there is vacuum between its double walls which prevents movement of heat through convection.
On the other hand, the glass walls of thermos are thin which helps in preventing the incoming or outgoing of heat through the process of conduction.
Thus, we can conclude that out of the given options, thermos bottle reduces energy loss due to conduction, convection, and radiation.