3)
Fly: butterfly, falcon, owl.
Swim: crocodile, shark, seal, whale
two legs: human, owl, falcon
four legs: elephant, crocodile, bear.
4) 1. An Elephant doesn't fly. It's got four legs. 2. A shark swims in the ocean. It's doesn't fly. 3.A Falcon flies very fast. It's doesn't swim. 4. A Bear can run fast. It's doesn't fly. 5. A crocodile can walk on land and swims in the sea. It's doesn't fly. 6. A human doesn't fly. A human can swim.