During which phase change does the arrangement of water molecules become more orderly?

a. melting
b. freezing
c. boiling
d. condensing

The phase change in which the water molecules become most orderly is the freezing. This is the process of changing water as liquid to its solidified form. The process of freezing is an exothermic which means that for this to occur, heat should be removed from the system. 

The answer is a) carbon-12