Answer:
Challenge
Step-by-step explanation:
Challenge is considered as an entrepreneurial advantage because it tend to 'force' people to actively improve themselves and find out inventive way to solve a problem.
When people feel that their job is not challenging enough, overtime they will feel that their activities become stale and boring. This will lead to the situation where they become unmotivated to even to come to work.
Having enough challenge at your work will keep you curious.
Like Paul, your work will make you feel excited and strive to prove yourself. This will make you constantly try to adapt to new things and keep improvising your craft.