What description below explains what happens to energy transfer in hot packs? energy is transferred from the system to the surroundings

energy is transferred from the surroundings to the system

energy is absorbed by the system​

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.