The active cell in spreadsheet software is the cell that is currently highlighted and ready for input or modification.

7. The active cell in spreadsheet software is the cell that is currently highlighted and ready for input or modification.

The correct option is B.

• A. A locked cell: A locked cell prevents changes but can still be the active cell.
• B. A selected cell: This is the definition of an active cell; it is the cell currently chosen for interaction.
• C. A hidden cell: A hidden cell is not visible and therefore cannot be actively interacted with.
• D. A merged cell: A merged cell is a combination of multiple cells, but when selected, it acts as a single active cell.

The final answer is $\boxed{\text{B}}$

8. The formula bar in spreadsheet software is a dedicated area where the content of the active cell is displayed and can be edited.

The correct option is B.

• A. Draw charts: Charts are created using charting tools, not the formula bar.
• B. Enter data and formulas: This is the primary function of the formula bar, allowing users to input or edit text, numbers, or formulas directly into the selected cell.
• C. Save files: Files are saved through the File menu.
• D. Delete rows: Rows are deleted using specific commands, not the formula bar.

The final answer is $\boxed{\text{B}}$