Question: Ice will form on small ponds when the temperature drops below 0°C. Which property of ice is most beneficial to fish living in these ponds?

  Options: 
 A. Ice has a temperature colder than the temperature of water.
 B. Ice absorbs sunlight that is reflected by water.
 C. Ice traps more pollution than is trapped by water.
 D. Ice had a density lower than the density of water. 
Answer: D