Question

they look like large spiky balls that would be impossible to swallow. unlike the puffer fish, a hedgehog curls itself up into a prickly ball when it senses danger. its sharp spines will poke the tender nose of anything that tries to eat the hedgehog. the pangolin is covered in hard, scaly plates that are like a suit of armor. when threatened, it also rolls itself up into a bite - proof ball. puffer fish, hedgehogs, and pangolins all have outer defenses. fill in the blanks to compare and contrast puffer fish, hedgehogs, and pangolins. puffer fish, hedgehogs, and pangolins are similar because they all defend themselves with protective inside parts. they are different because puffer fish defend themselves by looking , while hedgehogs themselves wetter larger smaller ins

Explanation:

Puffer - fish, hedgehogs, and pangolins all use outer - parts for defense. Puffer fish puff up to look larger as a defense mechanism. Hedgehogs curl into a ball with spines. Pangolins roll up with scaly plates.

Answer:

outer; larger; curl up into a prickly ball