As ice transforms into steam, a)new molecules are formed. b)the types of atoms are changed. c)energy is absorbed by the molecules. d)the mass of the molecules is increased.

This is an example of a substance changing state, a physical change, the molecules are changed, but the atoms themselves do not change, just their arrangement, and the mass of the molecules is the same. Therefor energy is absorbed by the molecules, as energy is required to change the state or physicality of a molecule structure.Hope this helps. Let me know if you need additional help!