Among the following, which one lays eggs and does not produce young ones directly?

1. The question asks which animal lays eggs instead of producing young ones directly (i.e., giving live birth). 2. This describes monotremes, a unique group of mammals. 3. The Echidna (spiny anteater), along with the platypus, belongs to the monotreme order. Echidnas lay eggs which are then incubated in a pouch. 4. Kangaroo (marsupial), Porcupine (rodent), and Whale (cetacean) are all mammals that give birth to live young.