Answer:
(b) Directional selection is
observed in moth, Bistonbetularia is industrial melanism .Under this,
individuals at one end of the frequency distribution do well light and so more
individuals of that type will be present in next generation.
The other options are incorrect because
in stabilizing selection, average sized individuals are favoured, e.g., weight
of new-born babies and in disruptive selection both extremes are favoured,
while intermediate varieties are eleminated, e.g., black bellied seed cracker ,Pyrenestesostrinus.
In artificial selection, the
individuals with desirable characteristics are deliberately selected to produce
a progeny with all those characteristics.
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