Analogies – Choose the pair that best completes the relationship. ELEPHANT : PACHYDERM :: ?

Introduction / Context:
This analogy uses a classification relation: an elephant is classified as a pachyderm in traditional usage. We need another species mapped to its correct higher-level group.

Given Data / Assumptions:

• Elephant → pachyderm (thick-skinned mammal grouping in older taxonomy).
• We want a correct species → class mapping.

Concept / Approach:
Choose the option where the first is a member of the second. Reject pairs with wrong categories or cross-kingdom errors.

Step-by-Step Solution:
1) Map ELEPHANT : PACHYDERM as animal : group.2) 'kangaroo : marsupial' fits exactly (kangaroo is a marsupial).3) 'mantis : rodent' is wrong class (mantis is an insect).4) 'poodle : feline' is wrong class (poodle is a dog breed).5) 'zebra : horse' are related species but not class; a zebra is not a horse.6) 'tuna : mollusk' is wrong class (tuna is a fish).

Verification / Alternative check:
Sentence test: 'A kangaroo is a marsupial' aligns perfectly with the pattern 'An elephant is a pachyderm.'

Why Other Options Are Wrong:

• mantis : rodent – Incorrect taxonomy.
• poodle : feline – Incorrect taxonomy.
• zebra : horse – Same family but not a member-to-class relation.
• tuna : mollusk – Incorrect taxonomy.

Common Pitfalls:
Close-but-wrong biological relations are common traps. Always check that the second term is the correct category for the first.

Final Answer:
kangaroo : marsupial