If you entered data into row 4 and it should be in row 3, you should a. click in row 4 and paste b. highlight the data in row 4 and drag it to row 3 c. use autofill in row 3 d. highlight a cell in row 3, place your cursor on the border of the cell so it turns into a two-sided arrow, and drag.

highlight the data in row 4 and drag it to row 3 ( B )

Explanation:

when entering data in a table that is part of a database data accuracy should be the main priority to avoid the table returning wrong information when queried for info later.

highlighting the data in row will enable the movement of the data to another row, without this action of highlight you can't move, copy or cut the data off from the wrong row.

you can't click in row 4 and paste because to paste you need to copy or cut, using auto-fill in row 3 won't  fill it up with what is in row 4 while highlighting a cell and dragging it's borders will only expand the cell.

answer; i believe the answer you're looking for is (nanotechnology);