1. Based on the article, what are some reasons animals use tools? Some animals use tools for protection, like dolphins putting sea sponges on their beaks, octopuses carrying shells to hide inside, or elephants using branches to swat flies. Others use tools to get food, like chimps using sticks to dig for termites.
(RI.4.9 INTEGRATING INFORMATION)
2. How is a dolphin’s unique whistle similar to a human name? A dolphin’s unique whistle is similar to a human name in that it can be used by other dolphins to identify that dolphin.
(RI.4.3 EXPLAINING IDEAS)
3. Why does the author mention an octopus’s brain and nervous system? The author mentions an octopus’s central brain and complex nervous system to explain why an octopus’s eight arms can move independently.
(RI.4.8 REASONS AND EVIDENCE)