How does psychology effect today's society?

Essentially, psychology helps people in large part because it can explain why people act the way they do. With this kind of professional insight, a psychologist can help people improve their decision making, stress management and behavior based on understanding past behavior to better predict future behavior. All of this can help people have a more successful career, better relationships, more self-confidence and overall better communication.

Explanation:

eat food

explanation:

cash registers don't need food because they are not alive.