Directional selection is observed in moth, Biston betularia which is also an example of industrial melanism. Under this condition, individuals at one end of the frequency distribution do well and so more individuals of that type will be present in next generation.
The other options are incorrect because in stabilising selection, individuals with average sized are favoured. e.g., weight of new-born babies and in disruptive selection both extremes are favoured. while intermediate varieties are eliminated. e.g., black bellied seed cracker, Pyrenestes ostrinus,
In artifical selection, the individuals with desirable characteristics are deliberately selected to produce a progeny with all those characteristics.