The roof and walls fall in. The structure becomes more and more disorganized and random. It eventually will become a pile of molecules and atoms indistinguishable as a house. This is the law of increasing entropy. Your desk or your room provides a good illustration.
Automobiles wear out and rust away.
Bees expend intentional purposeful energy to build elaborate hives. But when the intentionality is removed, the hive inevitably and invariably deteriorates and eventually disintegrates. Most evolutionists would, of course, acknowledge the validity of the second law of thermodynamics. Because of the second law of thermodynamics, we do not expect simple molecules to become complex ones in a random fashion. At first glance this hypothesis seems plausible.