Final answer:
Priscilla is using the ability to sort and categorize data, first by team and then by batting average.
Step-by-step explanation:
If Priscilla is organizing her baseball cards by team, then by batting average of members within the team, she is using the ability to sort and categorize data. Sorting involves arranging items in an orderly sequence. In Priscilla's case, she is first categorizing the cards by team, which is a categorical sort, and then she is sorting those categories by batting average, which is a numerical sort. Categorization allows for the grouping of items based on shared characteristics, while numerical sorting is often based on increasing or decreasing order.