Explain the answer to this riddle: What has four legs in the morning, two legs in the afternoon, and three legs in the evening?
This riddle is referring to a human. A human in infancy (morning) crawls using four limbs. A human adult (afternoon) walks on two legs. An elderly person (evening) walks on two legs and a cane.
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: Explain the answer to this riddle: What has four legs in the morning, two legs in the afternoon, and three legs in the evening?
### Input: 
### Response: This riddle is referring to a human. A human in infancy (morning) crawls using four limbs. A human adult (afternoon) walks on two legs. An elderly person (evening) walks on two legs and a cane.