Which group of animals has mammary glands for the production of milk?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Mammalia
Animals of class Mammalia have mammary glands that produce milk to feed their young; the class takes its name from these glands. Mammals also have hair on the skin and are warm-blooded.
Why the other options are incorrect
Option (1) Aves — Incorrect. Birds, with feathers; they lay eggs and have no mammary glands.
Option (2) Amphibia — Incorrect. Frogs and toads, with moist skin and life on land and in water.
Option (4) Reptilia — Incorrect. Snakes, lizards and turtles, with scaly skin; most lay eggs.