Therefore, in Doppler Effect only the frequency and wavelength are changes and the wave speed does not change
Answer:
There is no correct answer.
Explanation:
Different circumstances regarding how you operate your company and what kind it is.
Also, with sole proprietorships, it may be hard to manage liabilities, as the owner is <em>personally</em><em> </em>responsible for any liabilities. It is also hard to procure funding for your company.
However, it is simple to incorporate and allows for high flexibility, which may be what you mean by "easiest type ... to start".
I think it’s competition, since they both need to compete to get the nectar.