I think it's the culture/genes they were brought/born into. Because it can be genetically made into your DNA or you might be raised in that certain household/culture that you're used to.
Someone just answered your question!:) good luck and I hope you pass this quiz!!:D
<span>Holmes relied heavily on science to help gather evidence to solve crimes.</span>
Answer:
Most hearing parents of Deaf children rely on signing to communicate because they cannot afford hearing devices.
Explanation: