Stag : Fawn :: Cockroach : ? — Maintain the adult → young (offspring/nymph) life-stage relation.

Introduction / Context:
“Stag : Fawn” maps adult male deer to its young (fawn). We must mirror the adult → young relation for “cockroach.” Insects exhibit different developmental stages; recognizing the correct term is key.

Given Data / Assumptions:

• Deer young = fawn.
• Cockroaches undergo incomplete metamorphosis.

Concept / Approach:
In insects with incomplete metamorphosis (hemimetabolous), the immature stage is called a “nymph,” not larva/pupa (which belong to complete metamorphosis). Therefore, adult cockroach → nymph preserves the life-stage relation.

Step-by-Step Solution:
Identify relation: adult → juvenile stage.Cockroach development: egg → nymph → adult.Select “Nymph.”

Verification / Alternative check:
Biology references on cockroach life cycle confirm nymphal stages (instars) with successive molts.

Why Other Options Are Wrong:

• Cub/Colt: Mammalian young (lion/bear; horse), not insects.
• Larva/Pupa: Stages of complete metamorphosis (e.g., butterfly, beetle), not cockroach.

Common Pitfalls:
Assuming all insects have larval/pupal stages; cockroaches are hemimetabolous.

Final Answer:
Nymph