Which causes the thermal energy in a building to decrease?

the air conditioner and the heat engine
the furnace and the heat pump
the heat pump and the air conditioner
the heat engine and the furnace

The thermal energy in a building decreases because of the heat pump and the air conditioner.

The thermal energy increases because when the temp increase and it decrease when the temperature goes down. The air conditioner takes in heat and makes the room cooler. The heat pump works both ways, in winters it acts like a reverse air conditioner and in summers it works as an air-conditioner

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.

The particles of the gas inside the ball heats up, bouncing off each other and spreading farther apart.hope my answer has you : )