Everyone checks out of hotel Earth, everyone.
My family was staying at a hotel while we were in Spain, for vacation. My youngest son befriended another young child that we saw at the pool several days in a row.
That family checked out of the hotel before we did so my son didn't have anyone to play with at the pool anymore, and he was sad, naturally. I tried to explain to him that we don't have any control over when someone checks in and out of a hotel, he didn't understand, his young self only seeing the situation through selfish lenses, which all young humans must see the world through in order to survive.
IMO everything is a natural cause of death. Death is as natural as the universe, how can death be unnatural. It is 100% guaranteed, no human has avoided it, that is what you call natural. Hit by a bus, heart attack, killed by crazy lover, death becomes you. there are no categories to classify death. IMO