I would appreciate any advice you might have on the subject. A. Those are all good questions. They are less than an inch long and pale. Members of the clothes moth family will eat a wide variety of organic material, including wool, cotton, fungi and dead animals. Freezing the garments will definitely kill the larvae, but you must keep the garments in the freezer for several weeks.
Some insects can stand the cold for a long time.
I never recommend using pesticides on clothes. If you don't want to use mothballs, which are a fumigant, and if the infestation isn't severe, you can hang several strips of flypaper in the closets. The fish oil will attract male clothes moths and they will get entangled in the flypaper. This will stop the breeding process. The downside is that there will be a fishy smell in the closet.