What command is used to combine more than one cell in a spreadsheet?

The command "Merge Cells" is specifically designed for combining multiple selected cells into a single cell in a spreadsheet application. This is a common feature used to enhance the layout of data, making it easier to read and organize. When cells are merged, any text or data within those cells will usually be centered in the new, larger cell that is created. This is particularly useful for designing headers or for emphasizing certain areas of a spreadsheet.

The other options represent different functionalities: "Wrap Text" allows for text within a single cell to be displayed on multiple lines if the text exceeds the cell width, "Combine Rows" isn't a standard command in spreadsheet terminology and lacks specific functionality, and "Group Cells" generally refers to organizing data rather than merging them into one cell. Thus, "Merge Cells" is the correct choice for the action described.