What report format displays a list of records sorted into groups with subtotals?

The answer is the summary report. The summary report is the one responsible for having to show the list of records which are arranged in groups and are composed of subtotals as they are neatly arranged. The summary report is a way of showing information in groups in a more formal manner.

solution:

the right option is a

to adding   a new row to a table we   have to do process last table cell and pressing tab.

this is the process to add new row in the cell:

* to add a row below the cell, click insert below in the rows and columns group.

thus this is the required right answer.