Correct option is C
The correct one-word substitute for "Any female animal which feeds its young on milk from her own body" is "Mammal."
- A mammal is a warm-blooded vertebrate animal of a class that is distinguished by the possession of hair or fur, the secretion of milk by females for the nourishment of the young, and (typically) the birth of live young.
- Example: A dog is a mammal because it gives birth to live young and feeds them milk.
Meanings of all other options:
- Vertebrate: An animal that has a backbone or spinal column.
- Parasite: An organism that lives in or on another organism and benefits by deriving nutrients at the host's expense.
- Fauna: The animals of a particular region, habitat, or geological period.