Question

the second law of thermodynamics tells us that when energy changes forms, what happens? it is created out of nothing. some of it is lost, usually as heat. it increases with each transformation.

Explanation:

The first law of thermodynamics (conservation of energy) states energy can't be created out of nothing, so the first option is wrong. The second law of thermodynamics (related to entropy) says that when energy changes forms, some energy is lost, usually as heat (due to inefficiencies in energy transformations, like in engines or biological processes). The third option is wrong because energy doesn't increase with each transformation; in fact, usable energy tends to decrease (entropy increases). So the correct option is the one stating some energy is lost as heat.

Answer:

B. Some of it is lost, usually as heat.