- Reproductive behavior is a kind of instinct
- An example of a reproductive behavior is salmon returning to their birthplace to lay their eggs
- So, salmon returning to their birthplace to lay their eggs is a kind of instinct

So, salmon returning to their birthplace to lay their eggs is a kind of instinct
Question
An example of an instinct is

Context
- Reproductive behavior is a kind of instinct 
- An example of a reproductive behavior is salmon returning to their birthplace to lay their eggs