Answer:
B. Wood Burning
Step-by-step explanation:
When you boil water, it is still water, just in vapor form
When glass breaks, it is still glass.
when frozen water (ice) melts, it is still water.
When you mold iron, it is still iron.
When you burn wood, it is not still wood. It is a new form of matter. It is ash.
I hope I helped!
Let me know if you need anything else!
~ Zoe