Answer:
Name box
Explanation:
From the picture, the name box is at the top left corner with B1 written inside, here B1 is written because it is the active cell at the time which also happens to be the first cell of the selected range. The name box can be used to easily create a named ranges rather Than having to draw the mouse over a group of cells. It also helps to know which cell is the current active cell as the cell address in the name box is the active cell at any point in time.
