Final answer:
The Table filter is the reporting tool that can be used to exclude rows with fewer than 50 visits.
Step-by-step explanation:
The reporting tool that you would use to exclude any rows of a report with fewer than 50 visits is the Table filter.
A table filter allows you to set specific criteria for filtering the rows in a table, based on conditions you define. In this case, you would set a filter condition to exclude any rows that have fewer than 50 visits.
For example, if you're using a spreadsheet program like Microsoft Excel, you can use the Filter feature to easily apply the filter condition and exclude the rows with fewer than 50 visits.