Louise said:
If you put more text in a cell than will fit within the cell's width,
wrapping will cause it to appear on a second line within the cell, and then
(as you add more) on a third and subsequent lines.
In a chart, the x axis is the horizontal dimension.
The label you can give to a chart axis, indicating what that axis
represents.
Note that you can look up "wrapping" and "legend" in Help.