system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do people and animals get comfortable? What is comfort?
gpt
Comfort is a lack of hardship, danger or stress. From an evolutionary point of view, avoiding dangerous situations is obviously beneficial to survival, so an animal that experienced negative emotions  (discomfort) during these situations is going to try & avoid being in them. Feeling happy in a safe area means an animal would be more likely to stay in that safe area.