Metamorphism means to change form. In the geologist's sense it refers to changes in rocks (protoliths) in the solid state (i.e. not by melting the rock wholesale). One can view metamorphism as similar to cooking. Ingredients are mixed and placed at a different temperature (and/or pressure) and changes occur.
Keeping a room free of uneaten food and other trash will keep flies from being attracted to an area. Also keep garbage cans and dumpsters as far away from windows and homes as possible. Place a sticky trap near a window to capture any stray flies that do get into a home.Hang the sticky trap in a window sill or near the window. Flies will get stuck on the trap, and the dead flies and trap can be replaced as needed.eeping a room free of uneaten food and other trash will keep flies from being attracted to an area. Also keep garbage cans and dumpsters as far away from windows and homes as possible. Place a sticky trap near a window to capture any stray flies that do get into a home.
The windows and doors are either closed or have screen on. I cannot think out of some possible way for the flies to come in. There was an envelop slip on the front door, but it was by default closed, unless people from the outside want to deliver some mails to the inside.