Which of the following are included as an example of a business model:

1: two companies manufacture kitchen appliances: one business is more high-end than the other

2: two firms manufacture laptops. 1 firm prices their laptops lower due to the range is smaller and the design is kept non customized

3: 2 hair salons perform haircuts by their physical setups are different as well as their core attribute

So which one would be the correct answer

The answer is 3 but I want to make sure I have the correct answer can you please help