Cleanliness, comfort, climate
Instead of walking he could run or jog. If there is a longer way he took take that way
I'd say that the doctor would recommend to 1: to start a low-calorie, low-fat diet, 2: devote time to follow a workout plan, and possibly 5: Join a weight-loss support group, but I'm not sure about that one.
The reason the doctor wouldn't recommend 3 is because you're supposed to eat several servings of fruit per day, not once a week, and the reason the doctor wouldn't recommend 4 is because an increase in food consumption would add on to the patients problem of being overweight rather than help it.
Answer:
Good health is central to human happiness and well-being that contributes significantly to prosperity and wealth and even economic progress, as healthy populations are more productive, save more and live longer.