Respuesta :

Cetacea

Answer: There are certain physical and internal aspects of living organism that is used for the classification of animals.

Explanation: The characteristics that define an organism to be classified as animal are:-

  • Segmentation that defines the segments on the bodies of the animals which are of different kind
  • Whether the animal is in the category of chordata or non-chordata
  • Presence of embryo stage and number of tissue layers that are getting formed while the organism is developing
  • There are most chances of sexual reproduction.

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