Sentence:As part of their class, titled "Sustainable Building Design," the students analyze the [e1]components[/e1] of the [e2]building[/e2] that play a role in the structure's environmental impact, such as insulation, water usage and drainage, and the heating, ventilation and air conditioning (HVAC) system.
 e1: components. 
 e2 : building.
Answer: Component-Whole(e1,e2)