Classify these animals by either a mammal or reptile; 
 Lizard, Alligator, Elephant, Crocodile, Lion, Dolphin, Snake, Platypus, Chimpanzee
 Turtle
Yes, I grouped these animals as mammals and reptiles. Here is the categories;
 Mammals: Lion, Elephant, Dolphin, Platypus, Chimpanzee
 Reptiles: Turtle, Crocodile, Snake, Lizard, Alligator