Question

what main purpose does the line in this composition serve?
1.communicate a feeling
2.lead the eye
3.organize information
4.provide movement

Answer 1

A line can lead the viewer's eye so it is an effective element of design. It represents a path between two points.

Different types of lines are used to create effective photographs. Horizontal lines express tranquillity while vertical lines express strength and power. Oblique lines express movement and action. Curved lines or S shaped lines express quiet and sensual feelings. Converging lines imply depth, scale and distance. 

Answer 2

Organize information. is the answer. how? above the line talks about the elements of design and the below the line talks about lines.