What kind of line conveys instability, tension, and action

Diagonal lines convey instability, tension, and action.

Explanation:

The diagonal line communicates straight speed, velocity, and movement. For example in the scheme of a car crash, the direction of the cars is represented by diagonal lines that cross eventually. Because their movement originated in different directions but they will eventually share the same space. This was also imported in arts, specifically in comic, and visual arts due to the great value physics created to its representation codes.

its c its is a mixture of gases