How do people who have learned to be helpless differ from those who haven’t learned this?

Explain the concept of learned helplessness. How does it develop? How do people who have learned to be helpless differ from those who haven’t learned this?
Text: Psychology for Living: Adjustment, Growth, and Behavior Today
11th Edition, 2014 ISBN-13: 978-0-205-90902-5
Author: Steven J. Kirsh, Karen Grover Duffy, Eastwood Atwater