said Mr. Danvers in class the next day. “A predator, say a wolf or a shark, will generally catch and kill its prey. What does that leave for the scavengers?” A girl with short blue hair and black, kohled eyes said, “They find stuff to eat. Animals and things that are already dead.” “Exactly,” said Mr. Danvers, reaching for something on his bone shelf. He pulled down a jar the size of a two-liter soda bottle and turned back to the class. “They’ll steal stuff, too,” said Zoe. It was the first time she’d spoken up in any of her classes. She liked that Mr. Danvers didn’t make you raise your hand if you knew the answer. “On this show I saw they said some predators, lions sometimes, would rather steal food from another animal than go and find it on their own.” Mr. Danvers smiled at Zoe. “Good addition, uh . . .” “Zoe,” she said. “Good work, Zoe.