Knowledge: Eating any type of food as a child will help to become a diverse eater. On the other hand, consuming chicken breast and a lot of broccoli will lead to a fit body.

Conversation:
I'm a sports man. Physical fitness is regular stuff I do to keep fit.
Oh, yeah? Generally physical fitness can be had by good nutrition, exercise and rest.
What steps do I need to take to keep my body in shape?
I honestly don't know, though I can tell you that fitness is the state of being fit.
Ok, then do you know any food that will help keep my body in shape?

Response: I do know. Chicken breast and a lot of broccoli will help you stay fit.