A line is an identifiable path created by a point moving in space. It is one-dimensional and can vary in width, direction, and length. Lines often define the edges of a form. Lines can be horizontal, vertical, or diagonal, straight or curved, thick or thin. They lead your eye around the composition and can communicate information through their character and direction.
In this photo of a curved plastic boards, I see multiple curved plastic boards secured between multiple metal wires. The curved line, can be seen in the plastic boards. This curved line conveys a sense of adventure in my opinion. This image is appealing to me because it portrays a sense of you don't know how long this is or where it'll take you.
In this photo of manly boards of woods, I see many boards of wood and multiple metal lines. the horizontal lines can be seen in the boards. Horizontal lines convey a sense of stability in my opinion. This image is appealing to me because it looks secured even when towering above you..