Answer:
the answer is c. a tray of water freezes into ice cubes.
Step-by-step explanation:
a. is an example of a solid matter turning into a liquid matter. (keyword: melt)
b. is an example of a liquid matter turning into a gas matter. (keyword: boil)
answer, c. is an example of a liquid matter turning into a solid matter. (keyword: freezes)
d. is an example of a gas matter turning into a liquid matter. there is not a specific keyword that gave it away, however, water droplets or dew are a result of condensation.