What does it mean when you have a lot of flies in your house?

Housefly. The most common fly pest around homes. They lay eggs on wet decaying organic matter, on animal manure, and in rotting plant debris. ... Called blow flies because their larvae develop inside dead animals, causing the carcasses to bloat.

answer; /// the correct answer to the above statement is (a) because of the decline on native american labor forces;

b. b. b. is the anoswer