What mammal lays the largest eggs?
The echidna, an Australian monotreme, is the largest egg-laying mammal.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What mammal lays the largest eggs?
### Input: 
### Response: The echidna, an Australian monotreme, is the largest egg-laying mammal.