Which story belongs to the historical fiction genre? A.
a story about a character who fights dragons and trolls in an imaginary land
B.
a story about a character caught in the middle of the Revolutionary War
C.
a story about an alien character from a fictional planet in the future
D.
a story about a character who falls in love with a good friend

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.