Classification of animals based on mode of reproduction

Viviparous animals. Reproduce by giving birth to their younger ones.

Oviparous animals. Produce their young ones through eggs.

Grouping animals by classes

Mammals. Dolphin

Seal

Birds. Raven

Vulture

Fish. Trout

Clownfish

Reptiles. Lizard

Alligator

Amphibians. Toad

Caecilians

Insects. Beetle.

Tick