Mouse is to cat as fly is to

The analogy compares a prey to its predator. A mouse is prey to a cat; similarly, a fly is commonly prey to a spider. The spider–fly pair is an archetypal predator–prey example and is frequently cited as such in discussions of animal relationships. Ecological descriptions and food‑chain examples (e.g., grasshoppers eaten by frogs) illustrate this same “who eats whom” relation that underlies these analogies, i.e., prey: predator:: other prey: corresponding predator [1]. Therefore, among the options, “spider” correctly parallels “cat” as the predator corresponding to the prey “fly,” making option 3 the correct choice.

Sources

1. [1] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 8: Biodiversity > EE+tr#.SffiLME-EGf l>- ,--l \skl vfi1a > p. 145