text: A<unk> us animal is an animal employing<unk> : the embryo develops inside the body of the mother, as opposed to outside in an egg (ovipary). The mother then gives live birth.  
  The less developed form of<unk>  is called ovoviviparity, which, for instance, occurs in most vipers. The more developed form of<unk>  is called placental<unk> ty; mammals are the best example, but it has also evolved independently in other animals, such as in scorpions, some sharks, and in velvet worms.<unk> us offspring live independently and require an external food supply from birth. Certain lizards also employ this method such as the Genus Tiliqua and Corucia.  The placenta is attached directly to the mother in these lizards which is called<unk> us matrotrophy.
option_0: Vivipary
option_1: Unitaid
option_2: Ventouse
option_3: Geneticist
option_4: Firefighter
option_5: Mental health professional
option_6: Camp Setebaid
option_7: Nurse