The answer would be the cracking of rock caused by the freezing and thawing of water.
Answer:
eventually there wouldn't be enough for the bottom of the chain then they would die and then the middle of the chain would eventually die and then the top will die
Explanation:
ITS D the other person said its two and b but no its d i got this wrong
ITS D ITS D ITS D ITS D ITS D ITS D ITS D