Question

What is the basic d/f b/n a contour line and a formline​

Answer 1

Answer. is that contour is an outline, boundary or border, usually of curved shape while line is a path through two or more points (compare 'segment' ) a continuous mark, including as made by a pen; any path, curved or straight or line can be (obsolete) flax; linen, particularly the longer fiber of flax.