Sigmund Schlomo Freud is known as the originator of the Psycho-dynamic approach to psychology. This branch of psychology studies the ignorant forces that make people respond in a certain way. Freud talks about mind, that mind is liable for both conscious and unconscious based on forces and drives. According to him, dreams are the representation of our unconscious wishes, thought and motives.
because to do laundry you need both a washer and dryer so thus after buying a washer they would need to by a dryer so the prices of dryers would increase.