Answer:
practical
Explanation:
According to my research on the different categories of skill sets, I can say that based on the information provided within the question Jackie's ability to work effectively displays practical skills. These are skills that are performed by hand (physical labor) or with with machinery that require human intervention to work them, these skills require very less intelligence and more physical action.
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Once answer could be that the land between the Tigris and Euphrates Rivers was very fertile. That place is referred to as the "Fertile Crescent" after all.