In order for an animal to gain mass what does it need?

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.

Amines amides and amino acids are categories of

Animals that have thick fur and ae able to store large amounts of body fat live where ?