1. The classification of animals

     
     

     

We can classify animals using different criteria.

  • The skeleton. Vertebrates have a skeleton. Invertebrates do not have a skeleton.
  • The way animals are born. Viviparous animals are born from their mother’s womb. Oviparous animals are born from eggs.
  • The food they eat. Some animals eat meat, some eat plants and some eat both meat and plants.
  • The way animals move. Some animals walk, some fly, some swim and some crawl along the ground.
     
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