One advantage is that if successful, all the money goes to you. If you're a huge company with shareholders, then the people and the investors get some of the money the company makes. In a sole proprietorship, everything goes to you and then you can choose what to do with it.
Amerigo Vespucci is best known for his namesake: the continents of North and South America.
Your teacher may be looking for something more specific than this. But, now the idea of evolution is generally accepted and now with modern technology we can mostly prove his theory. (it isnt proven as it is a theory).
I believe the answer is: <span>Humanize
During the childbirth, women most likely experience the most excruciating physical pain that they ever felt in their life, followed by mental stress and pretty high chance of death.
Medical workers and encouragement from a partner, would reduce all negative things above and increase the chance of successful childbirth.</span>
