Why do armadillos roll into balls?

Answer: Armor protects from predators

Armor protects from predators ✓ — Correct! Defensive armor! Only some species (three-banded armadillo) fully roll. Defense mechanism: (1) Hard shell (carapace)—modified skin/bone plates. (2) Roll into ball—no vulnerable soft parts exposed. (3) Predators can't penetrate or unroll. Shell protects from bites, claws. Other armadillo species burrow or run instead. Shell also protects from thorns in habitat. Trade-off: armor adds weight, slows movement. Unique mammalian adaptation. Name means 'little armored one' (Spanish)!

Conserves body heat in cold — Wrong. Rolling doesn't conserve heat. It's predator defense—hard shell ball protects vulnerable belly from attacks.

Catches insects while rolling — Wrong. Armadillos don't catch insects by rolling. They forage by digging with claws—rolling is defensive response to threats.