The question presents a pair of words, 'Flies : Swarm', and asks us to find a similar relationship with 'Dolphins : ?'. Let's break down the relationship to identify the correct answer.
- The word 'Swarm' refers to a group of flies or other insects. Therefore, 'Swarm' is a collective noun used for a group of flies.
- Similarly, we must find a collective noun that refers to a group of dolphins from the provided options.
Let’s evaluate the given options:
- Skulk: Skulk is generally used for a group of foxes. Therefore, it does not match the context of dolphins.
- Pack: Pack commonly refers to a group of wolves, dogs, or related animals, not aquatic creatures like dolphins.
- School: This is the correct collective noun for a group of dolphins. It fits the context appropriately, as 'School' is used for aquatic animals like fish, dolphins, etc.
- Litter: Litter usually describes a group of offspring born at one time to an animal, commonly used for kittens or puppies, not applicable to dolphins.
- Colony: Colony can be used for animals like ants or penguins, but it is not the specific collective noun for dolphins.
Based on the analysis above, the correct answer is School.
Therefore, the analogy is 'Dolphins : School'.