How do animals use rocks as tools?

Answer 1

Birds have gizzards that rely on small pebbles to help grind the food they ingest. The human animals' use of rocks is breathtaking in scope. Sea otters use rocks to break shells of sea creatures before eating them.

Answer 2

Animals use rocks as tools by using them to crack open hard shells for food, as hammers to break open nuts, or as anvils to support items they want to crush. Some animals also use rocks as weapons to defend themselves or to establish territory.