The correct answer is: D. Gaggle : Geese
A shoal is a group of fish swimming together. A gaggle is a group of geese flying together. Both shoals and gaggles are large groups of animals of the same species that move together.
Aerie is the nest of an eagle. Apiary is a place where bees are kept. Drake is a male duck. None of these pairs of words have the same relationship as shoal and fish.