Respuesta :
I believe the answer is: Self-interest
According to adam smith, people in general would put their own self-interest over other things that they are not interest in. Even though in some cases pursuing only for our self-interest could be a bad thing, in some cases it could make people able to pursue their dreams regardless of their unfavourable circumstances.
In the example above, self-interest cause mark to learn to cook without proper training. Self-interest to accumulate wealth for himself also drive his decision to start a restaurant.