I’m torn between a and b. i’ve asked many and people say a, but i asked my science teacher and she said b. and also i’ve researched and on answers. com also says water is the better insulator..but idk i’m conflicted! apex but then again it says
thermal

If your science teacher says B, it’s probably because water has a negative and positive end, heat is just a form of energy, as other atoms can’t leave (they’re attracted to the ends) they are being insulated; but notice that ice will melt into gas (where atoms have tons of space) for other atoms to escape. Hence ice and gas aren’t ideal. (Air is a gas here.)
It’s not a 100% but hopefully it helps with some kind of analogy.