The intention to prevent weight gain and loos weight by restricting food intake and avoiding food as long as possible is called restrained eating.
In restrain eating people usually do not reduce the overall calories but they limit the intake of specific macronutrients like fat, carbohydrates. Very high-level dietary restraint does not allow successful weight loss and leads to abnormal patterns of eating. 1200 calories are taken every day by a highly restraining eater.
Therefore the correct answer is d. restrained eating.
