This scenario is the best example of the planned changes.
In the planned changes, the cause of the change is identified, and according to the cause, a new plan is made, which helps in getting rid of the unwanted changes. the new plan is implemented and the action for the change is done.
In this case, the obesity as cause of the change in the westernized diet is identified. According to the cause, the planning of intake of low calorie and low fat diet is introduced.