Question

unlike the puffer fish, a hedgehog curls itself up into a prickly ball when it senses threats. its sharp spines will poke the tender nose of anything that tries to eat the hedgehog. why do hedgehogs curl into a ball? hedgehogs curl into a ball to get ready to run away. hedgehogs curl into a ball to search for animals that could hurt them. hedgehogs curl into a ball to go to sleep when they are tired. hedgehogs curl into a ball to protect themselves from predators.

Explanation:

The text states that hedgehogs curl into a prickly ball when they sense threats, and their spines will poke predators. This indicates it's a self - defense mechanism.

Answer:

Hedgehogs curl into a ball to protect themselves from predators.