You are presented with the question "A platypus is an example of _." and the following answer choices: 
- Marsupial.
 - Monotremes.
 - insects
 - animals
 - killing insects
 - Amphibian.
 - Placental mammal.
 - matter vibrating

Now knowing that monotremes are mammals that reproduce by laying eggs and well, platypuses are mammals, and they lay eggs, choose the best answer.


 

  Monotremes.       