You are presented with the question "Platypus and Echidna are mammals that reproduce by what?" and the following answer choices: 
- hospital visits
 - cesarean sections
 - organs
 - warm-blooded
 - fur and fat
 - live birth
 - competition
 - laying eggs

Now knowing that monotremes are mammals that reproduce by laying eggs and examples of monotremes are the Platypus and Echidna, choose the best answer.


 

        laying eggs 