Answer:
option B
Explanation:
The correct answer is option B
By adding insulation to ceiling we can save about 2,000 kilowatt-hours/year.
Insulation is the process of maintains the temperature of the room. Insulation of the ceiling helps in extreme winter and summer.
Insulation is also used to reduce the noise pollution inside the house and Insulation can be used to save energy.
As the usage of the heater in winter and ACs in summer can be reduced.
