- Inheriting is when an inherited characteristic from parent to offspring
- Sound of voice is an inherited characteristic
- Therefore, offspring can inherit the sound of voice from their parents

- Offspring can inherit the sound of voice from their parents
- Animals produce offspring
- A human is a kind of animal
- So, the offspring of a human can inherit the sound of voice from their parents

- The offspring of a human can inherit the sound of voice from their parents
- A son is a kind of male offspring
- A father is a kind of male parent
- So, a son can inherit the sound of voice from his father

So, a son can inherit the sound of voice from his father
Question: Which of these is most likely the cause of a father and son having almost identical-sounding voices?
Context: - Inheriting is when an inherited characteristic from parent to offspring 
- A son is a kind of male offspring 
- A father is a kind of male parent 
- Animals produce offspring 
- A human is a kind of animal 
- Sound of voice is an inherited characteristic