Why do cats like to dig into boxes?

The reasons why cats like to get into boxes:
1. When the temperature drops and cats feel cold, they will look for a warm place to stay, and cardboard boxes can keep them warm.
2. When a cat feels scared when it arrives in a new environment, it will hide in a small space to make it feel safe.
3. When cats feel anxious, they will also hide in the box to regulate their emotions and relieve stress.
4. Cats are very curious and want to see what is in the box, so they will get in and check.
5. When cats feel bored, they will also get into the box to pass the time and find fun.