What feature can be used to center text across a selection of cells?

The feature that allows you to center text across a selection of cells is found under the alignment options in the Home tab. By navigating to Home and selecting the appropriate alignment, users can choose the "Center" option. This function specifically allows the text to be centered horizontally within the merged cell range or across the selected cells, providing a cleaner and more organized appearance in the spreadsheet.

Other options do not directly apply to centering text across cells. For instance, the option from the first choice regarding text options does not provide the specific alignment functionality needed. The page layout choice focuses on adjusting the view of the spreadsheet rather than manipulating cell content. Similarly, the insert menu typically deals with adding objects or features rather than text formatting or alignment. Thus, focusing on the Home > alignment > horizontal alignment option correctly utilizes Excel's built-in features to achieve the desired text formatting.