I believe the answer is D, though I'm not entirely certain unfortunately.
Co2 is indeed the correct answer, my friend.
Water transitions to ice when temperatures drop too low, while it turns into gas when temperatures rise too high.
Conversely, ice transforms back into water when heated, remaining unchanged if temperatures are too low.
Furthermore, gas transitions to water when cooled and can freeze into ice if cooled further, continuing this cycle.
I hope this clarifies things.
Answer:
Endothermic: water formation from ice and a cold instant ice pack Explanation:
