Classification — predator–prey vs unrelated domestic pair: Which pair is unlike the others: Cat : Mouse, Lion : Deer, Cow : Hen, Hawk : Snake?

Introduction / Context:
This verbal classification item mixes predator–prey pairs with one pair that does not reflect a feeding relationship. Your task is to isolate the unique pair that lacks the “hunter → typical prey” bond.

Given Data / Assumptions:

• Cat : Mouse — cats commonly hunt mice.
• Lion : Deer — lions prey on deer/antelope-type animals.
• Hawk : Snake — raptors can prey upon snakes.
• Cow : Hen — two domesticated animals with no predator–prey relation.

Concept / Approach:
Group options by ecological relation. Three are predator–prey. One is simply co-domesticated species without predation between them.

Step-by-Step Solution:
1) Check if the left animal normally hunts the right.2) Cat→Mouse = yes; Lion→Deer = yes; Hawk→Snake = yes in many ecosystems.3) Cow→Hen = no; they are herbivore/omnivore farm animals with no such relation.

Verification / Alternative check:
Consider diet classes: cat and lion are carnivores; hawk is a raptor; cow/hen are not predator–prey counterparts. This independently confirms the outlier.

Why Other Options Are Wrong:
They each present a plausible, commonly-cited predator–prey relationship.

Common Pitfalls:
Overthinking rare exceptions (e.g., unusual behaviors). Classification questions rely on typical, well-known relations.

Final Answer:
Cow : Hen