Question

When a salmon is ready to reproduce, It returns:

to the stream where it was born
to the ocean
to a stream

Answer 1

When a salmon is ready to reproduce, It returns to the stream where it was born.

Step-by-step explanation:

They do so because they 'know' it is a good place to spawn; they won't waste time looking for a stream with good habitat and other salmon. It offers salmon a higher chance of successful reproduction because it is a familiar area proven to be perfect for spawning.

Hope this helps