Which of the following is not a way to redirect your energy?
a. engaging in physical exercise
b. working on a creative project
c. participating in something you enjoy
d. obsessing about the problem

There's no redirection at all if you keep your mind on the problem. That just uses up energy worrying and leads to all kinds of unhealthy behavior. For the other three, just ask yourself "could this make me feel better?" It probably will. Even if it doesn't, just acting to try and make the problem go away could make you feel energized and inspire you to move on from the problem.

It's obvious the answer is D