You are presented with the question "buildings use a combination of production, exchange, and distribution of energy to for what" and the following answer choices: 
- energy usage
 - consumers
 - ventilation
 - views
 - survival
 - temperature
 - Quality of life
 - water

Now knowing that energy is used for heating a building by a heating system and each system is equipped with a control, a heat producer, a heat exchanger, and a heat distributor, choose the best answer.


 

      temperature   