If few female warblers return to Canada, there will be few young warbler will hatch.
Migration is the seasonal movement of animals from one location to another.
Since the breeding ground of the Black-and-white warblers is in Canada, a consequence if They fail to return is that their will be reduced number of mating. Hence, few hatched warblers will result.
Therefore, there will be few young warbler that will hatch.
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