There are lines in structures.
But the line that came to my mind was a line I am familiar with every week
when I do the laundry.
The clothes line.
Once the clothes or in this case a large sheet is put there,
it is no longer a straight line.
It curves and sways with the breeze.
Almost every week my sheets are hung to dry right here on this line.
What line comes first and foremost to your mind?