The line is a mark that connects the space-separated by points. They consider it essential for many arts. It can also determine direction, energy, movements, and many emotions depend on how you use it.
Our psychological system has a different reaction with different lines.
Line is defined as a path through space. Horizontal lines create a path from side to side, and provide the horizon for a two-dimensional piece of art. Vertical lines create a path up and down, and provide strength and permanence to a piece. Diagonal lines slant and help create a sense of motion. Curvilinear lines, or curved lines, slowly change direction. Spirals and circles begin with a curvilinear line. Zigzag lines are connected, usually diagonal lines, and can travel horizontally or vertically.
control of that object,especially if your depiction is larger than the other..not sure what form of art u r studying, but iam confident of my answer..thx