Classification – Odd one out (animal–sound correctness): Which pair is incorrect compared to the others: Lion - Roar, Snake - Hiss, Bess - Hum, Frog - Bleat?

Introduction / Context:
Animal–sound classification hinges on standard pairings. Three of the pairs are commonly accepted, while one mismatches the animal and its typical sound, giving us a single incorrect pair as the outlier.

Given Data / Assumptions:

• Lion → roar (standard association).
• Snake → hiss (standard association).
• Bees → hum (listed as “Bess - Hum,” presumably bees → hum).
• Frog → croak/ribbit (not “bleat”).

Concept / Approach:
Validate each animal–sound mapping against common usage. The pair that assigns the wrong sound is the odd one out.

Step-by-Step Solution:
Lion - Roar → correct.Snake - Hiss → correct.Bees - Hum → correct (typo in “Bess” assumed).Frog - Bleat → incorrect; frogs croak, goats bleat.

Verification / Alternative check:
Even considering dialectal variations, frogs are not associated with “bleating.” Thus the mapping remains incorrect and unique.

Why Other Options Are Wrong:

• The other three pairings align with standard animal-sound associations and therefore belong together.

Common Pitfalls:
Letting typos (“Bess”) obscure the intended standard mapping (bees → hum).

Final Answer:
Frog - Bleat