Answer:
b: density decreases
e: volume increases
Step-by-step explanation:
When the water changes to ice, there won't be a loss of water, so the mass will be the same. However the ice will occupy more space, so the volume will increase. Then, since density is the mass divided by the volume, if the volume increase and the mass stays the same, the density decreases.
So, the answers are:
b: density decreases
e: volume increases