Q1. Do humans naturally walk heel, ball, and toe, like we do at the present? I have heard that the only reason this is true is because of the amount of padding in the shoe. Otherwise, I don't see a reason to walk heel, ball, and toe. Without shoes, body would receive a lot of stress with each step.

Q2. Jill is motivated by money and the things money will bring her. Jack is motivated by a belief in the significance of doing good things, and his incentives are based on that belief. Which theory incorporates both these types of motivational causes?