Behavioral psychology and neuroscience now become important disciplines for marketing companies to change the way humans think and do. When we are surfing online, on the other side of the screen is a group of experts whose job is to keep us as  (31)   as possible. Exciting headlines and sensational contents are tactics they usually use to  (32)  our attention effectively. It is almost impossible for modern people to get away from the smartphone because we feel  (33)  when it is out of reach. The marketing company understands well how the brain is programmed and takes advantage of its reward system, (34)  leads to feelings of happiness and satisfaction. After getting used to a specific type of app, we (35)  it to get the pleasure we once had.