system
Given the following post, respond as if you're commenting on Reddit:
human
How do snails survive freezing in winter?
gpt
Snails use a variety of strategies to survive freezing winters. Some are able to burrow into the ground, insulating themselves from the cold. Some species can excrete some of their water and break down proteins to increase the osmolarity (the concentration of dissolved solutes in their bodily fluid) which reduces the freezing point. Some species trap pockets of air inside their shells which serves as insulation. Others do not need to hibernate at all can crawl on snow without freezing.