Question: Why do senses link?

Mary Jane Spiller answered on 15 Mar 2017:

I think our senses link because we recieve information from all our senses all of the time, so our brains need to decide what to focus on and what to ignore – and so what we hear may help us to work out whether what we can see is useful or not. It also adds extra information to our experiences.
I hope that helps answer!