Respuesta :
I believe the correct answer would be D, turning up the heat in cold water. Because you are then paying more money to turn the heat up instead of Doing the other ideas.
The answer is: turning up the heat in cold weather
Energy efficient is a situation when we use less energy in order to do our daily activities.
Turning up the heat in cold weather actually consume a lot of energy because we need to use electricity to increase the temperature in the house.
