Multiple choice

What am I? I have fur or hair, usually give birth to live young and nurse my baby with milk.

  1. amphibian

  2. bird

  3. mammal

  4. reptile

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mammals are unique among vertebrates for having hair or fur and producing milk to nourish their young. Most mammals also give birth to live young.