Final answer:
The subject of the question is Computers and Technology, and it is about using labels in spreadsheet programs like Microsoft Excel.
Step-by-step explanation:
The subject of this question is Computers and Technology and the grade is High School. The correct answer to the question is Labels (option a). Labels are descriptive names that can be assigned to cells, ranges of cells, formulas, or constants in spreadsheet programs like Microsoft Excel. They are used to make it easier to understand and reference specific elements in a spreadsheet. For example, instead of referring to a cell as A1, you can assign the label 'Sales' to it, which provides more context and clarity.